Genetics and Developmental Biology

Cytoplasmic Ca2+ concentration and the fertilization envelope

Cytoplasmic Ca2+ concentration and the fertilization envelope

During fertilization in sea urchins, Steinhardt and his colleagues observed that the sperm-induced rise in cytoplasmic Ca2+concentration correlates with the formation of the fertilization envelope, which blocks fusion of other sperm with the egg. Loo

adrii01   17405   8 Replies

mdawson1138

Part A - Independent assortment of three genes

Part A - Independent assortment of three genes

Linked Genes and Linkage Mapping



If two genes are found on different chromosomes, or if they are far enough apart on the same chromosome that the chance of a crossover between them is very high, the genes are considered t

dec zoo   16974   3 Replies

daniellehorses

Gene Interaction - Mastering Chemistry, Alleles?

Gene Interaction - Mastering Chemistry, Alleles?

Based on your analysis so far, you assign the following allele symbols to the three lines:
Wild type = A_ V_
Aberdeen White = a a
Kansas Yellow = aYaY
Victoria White = v v

Using these symbols, assign genotypes to the

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loljaneysaur   15795   99 Replies

Noor Amin

What's the difference between a monohybrid and dihybrid cross?

What's the difference between a monohybrid and dihybrid cross?

And what's the difference between their genotypic and phenotypic ratios? I didn't get this when the teacher was lecturing, thanks And how do you do each cross?

mike13m   15661   1 Reply

lgood4

virtual lab dna and genes worksheet

virtual lab dna and genes worksheet

anyone have the answers?
THANKS

Table 1:  Please complete this information in the area below BEFORE actually completing the virtual activity; you can then refer to it to help make the correct selections at each step.  Rememb

dbcarley   15455   6 Replies

lobell

The effect of Ca2+ channel blockers on formation of the fertilization envelope

The effect of Ca2+ channel blockers on formation of the fertilization envelope

The role of Ca2+ ions in the formation of the fertilization envelope and blocking polyspermy can be further studied using Ca2+ channel blockers. As their name suggests, Ca2+ channel blockers block the movement of Ca2+ ions through channels. In the ca

adrii01   15375   10 Replies

Bheka

You recognize that Athlete 2 may have one of several possible defects in the AR signaling pathway.

You recognize that Athlete 2 may have one of several possible defects in the AR signaling pathway.

You recognize that Athlete 2 may have one of several possible defects in the AR signaling pathway.

For the molecular defects listed below, predict what their effects would be on AR signaling and ultimately on the development of the genital

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dimplepatel2013   14435   46 Replies

wigga

In some mutant maize plants, KN1 is expressed at high levels in leaves.

In some mutant maize plants, KN1 is expressed at high levels in leaves.

As with all multicellular organisms, homeotic genes in plants control morphogenesis (how the tissues and organs of the plant are arranged).
   
   In maize plants, the homeotic gene KNOTTED1 (abbreviated KN1) helps maintain the indeterminate s

adrii01   14325   8 Replies

Nope26

After successfully incorporating into the genome of a fly, the construct DNA will: (Transgenic fly ...

After successfully incorporating into the genome of a fly, the construct DNA will: (Transgenic fly ...

Part 1: Quiz

1. In this experiment, the reporter gene

a.tells the experimenter exactly how much of the native protein was produced
b.changes the color of the flies' eyes
c.must be from the same type of organism as

psychmajor74   13982   5 Replies

psychmajor74

Use the information in the family history to construct a pedigree

Use the information in the family history to construct a pedigree

Having trouble answering these questions.

John and Jane Jones’ newborn baby girl, Leah, has just been diagnosed with galactosemia. Prior to their genetic counseling appointment, they submitted this family history:

- John and Jan

sarabear144   13577   5 Replies

Jackie4

Feather color in parakeets is produced by the blending of pigments produced from two biosynthetic ...

Feather color in parakeets is produced by the blending of pigments produced from two biosynthetic ...

Feather color in parakeets is produced by the blending of pigments produced from two biosynthetic pathways shown below. Four independently assorting genes (A, B, C, and D) produce enzymes that catalyze separate steps of the pathways. For the question

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fodog414   13561   14 Replies

diane boladas

Calculate the recombination fraction between??? Genetics help

Calculate the recombination fraction between??? Genetics help

Problem 5.13

Kernel Phenotype    Number
Colored, shrunken, starchy    116
Colored, full, starchy    601
Colored, full, waxy    2538
Colored, shrunken, waxy    4
Colorless, shrunken starchy    2708
Colorless, full, starchy

fodog414   13418   7 Replies

Kaming Chan

What are the results of nondisjunction, and why are these chromosome alterations

What are the results of nondisjunction, and why are these chromosome alterations

What are the results of nondisjunction, and why are these chromosome alterations so detrimental to an individual?

barry   13326   1 Reply

duddy

Pattern formation in plants

Pattern formation in plants

Although each cell in a plant contains the same set of genes, different patterns of gene expression cause cells to differentiate and develop into many different cell types within a single plant. Cellular differentiation depends to a large extent on p

adrii01   13258   7 Replies

jrodsasone

How do you predict the frequency of a progeny?? Genetics

How do you predict the frequency of a progeny?? Genetics

Genes A, B, and C are linked on a chromosome and found in the order A-B-C. Genes A and B recombine with a frequency of 10%, and genes B and C recombine at a frequency of 21%. For the cross a + b + c /abc + × abc / abc, predict the frequency of progen

fodog414   13254   11 Replies

Roposo star

What is the number of deaths due to sickle-cell anemia in a region without mosquitoes expected to be

What is the number of deaths due to sickle-cell anemia in a region without mosquitoes expected to be

Q1. What are alleles?
a)Different forms of the same gene.
b)Different genes.
c)The different characteristics of an organism.
d)Genes found only in humans.

Q2. If you add up the frequency of homozygotes + the frequency o

gh1991   12689   2 Replies

duddy

Drag the appropriate tRNAs to the binding sites on the ribosome to show the conf

Drag the appropriate tRNAs to the binding sites on the ribosome to show the conf

Instructions;

"Drag the appropriate tRNAs to the binding sites on the ribosome to show the configuration immediately before a new peptide bond forms. If no tRNA is bound to a site at that time, leave that binding site empty"

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ivanvonivanson   12525   15 Replies

tabs

Identify bases in the bottom strand that can be transcribed into start and stop

Identify bases in the bottom strand that can be transcribed into start and stop

Recall that DNA and RNA are synthesized only in the 5'→3' direction and that DNA and RNA sequences are written in the 5'→3' direction, unless otherwise noted.

Consider the following DNA sequence:
5

kdol   12215   9 Replies

Secret Combo

The theory of plate tectonics explains how Eath's continents move. According to this theory, which o

The theory of plate tectonics explains how Eath's continents move. According to this theory, which o

Q58. According to your regression analysis mammal diversity is best predicted by which of the following?
A-Temperature
B-Precipitation
C-Potential Evapotranspiration
D-Actual Evapotranspiration
E-Tree species richness
F-

gh1991   12173   4 Replies

bio_man

Compare and contrast DNA and RNA.

Compare and contrast DNA and RNA.

Compare and contrast DNA and RNA.

barry   11878   3 Replies

Jen W

Determining genotypes in autosomal recessive pedigrees

Determining genotypes in autosomal recessive pedigrees

Part C - Determining genotypes in autosomal recessive pedigrees
Pedigree 3 from Part A is shown below. Recall that this pedigree shows the inheritance of a rare, autosomal recessive condition.

Note that individual II-3 has no family

Yaday   11565   13 Replies

patulia

Determining parental and F1 genotypes in crosses involving polygenic inheritance

Determining parental and F1 genotypes in crosses involving polygenic inheritance

Below is the information we got for this question and there is an attachment showing the options we got:

You decide to designate the alleles of the four loci as either additive (contributing to fruit segment number and represented by a sup

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FusedMentality   11335   16 Replies

hoonahroosh

Dideoxynucleotide DNA sequencing (Mastering Genetics)

Dideoxynucleotide DNA sequencing (Mastering Genetics)

The diagram below shows an autoradiograph of a DNA sequencing gel.

Type the 5' to 3' sequence of the template strand (“inferred strand”) based on the pattern in this gel. Use only capital letters for the sequence.

mmurt13   11164   7 Replies

Poliann Flores

Comparing map-based and whole-genome shotgun sequencing...

Comparing map-based and whole-genome shotgun sequencing...

I need help with this Mastering Genetics problem:


Decide if the following statements best describe map-based genome sequencing, best describe whole-genome shotgun sequencing, or apply equally to both sequencing methods. Sort each sta

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verbatim   11071   68 Replies

Daniel Steidel

What would you predict the microdensitometer graph would look like after each round?

What would you predict the microdensitometer graph would look like after each round?

Suppose that the scientists analyzed the same amount of DNA (10 units) by density-gradient centrifugation after two, three, and four rounds of replication in 14N medium. What would you predict the microdensitometer graph would look like after each ro

cargirl2012   10988   2 Replies

cargirl2012

Part B - How can someone with a Y chromosome develop as a female?

Part B - How can someone with a Y chromosome develop as a female?

One key determinant of sex determination is the SRY gene itself. This gene is located on the Y chromosome, and the protein it encodes is a DNA binding protein that regulates other genes. The normal action of the SRY protein is to induce transcr

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dimplepatel2013   10974   30 Replies

urine tsunami

How are additive alleles determined when examining polygenic inheritance?

How are additive alleles determined when examining polygenic inheritance?

Two pure-breeding lines of orange trees differ in the number of fruit segments they contain: One line produces fruit with 6 segments, and the other produces fruit with 10 segments. When these lines are crossed, the F1 produces fruit with 8 segments.

jbritlyn   10810   7 Replies

arijm

How do you do dihybrid crosses WITHOUT using punnett squares?

How do you do dihybrid crosses WITHOUT using punnett squares?

Please show me with an example, like YyCc X YyCc        
Punnet Squares take forever to get the genotype and phenotype ratios, especially when you get alot of allelles  and incomplete dominance and stuff,,   there has to be a better way.
Please H

datpiff   10807   6 Replies

McFunk

Crossing over plays a critical role in increasing the genetic variation among offspring of sexual ...

Crossing over plays a critical role in increasing the genetic variation among offspring of sexual ...

Part B - Crossing over
Crossing over plays a critical role in increasing the genetic variation among offspring of sexual reproduction. It is important to understand how crossing over occurs and its consequences in meiosis. Look carefully at the

mrek068   10686   7 Replies

Hunter Mark

How do earthworms create a moist local environment for gamete fusion?

How do earthworms create a moist local environment for gamete fusion?

How do earthworms create a moist local environment for gamete fusion?

rla0705   10642   1 Reply

rl93

One strand of a fragment of duplex DNA has the sequence 5'-A-T-C...

One strand of a fragment of duplex DNA has the sequence 5'-A-T-C...

Hey everybody have a few questions.

Part E what enzyme catalyzes the reaction in part D

Part F what type of bond joins one strand of DNA duplex to the other strand.

Part H
What term is used to describe the patter

fodog414   10539   N/A

fodog414

Punnett squares - What genetic information can be obtained/what genetic information cannot be determined?

Punnett squares - What genetic information can be obtained/what genetic information cannot be determined?

What genetic information can be obtained from a Punnett square? What genetic information cannot be determined from a Punnett square?

buddhaboo   10225   2 Replies

bucksfan1690

An organism having the genotype AaBbCcDdEe is self-fertilized. Assuming the loci

An organism having the genotype AaBbCcDdEe is self-fertilized. Assuming the loci

An organism having the genotype AaBbCcDdEe is self-fertilized. Assuming the loci assort independently, determine the following proportions:


gametes that are expected to carry only dominant alleles.
Express your answer using thr

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sjohn092   10120   26 Replies

Hausr

Part B - Nondisjunction Suppose a diploid cell with three pairs of homologous ch

Part B - Nondisjunction Suppose a diploid cell with three pairs of homologous ch

Part B - Nondisjunction
Suppose a diploid cell with three pairs of homologous chromosomes (2n = 6) enters meiosis.

How many chromosomes will the resulting gametes have in each of the following cases?
Drag one label into each spac

veze12345   9972   4 Replies

carota

Compare and contrast prokaryotic and eukaryotic gene expression.

Compare and contrast prokaryotic and eukaryotic gene expression.

Compare and contrast prokaryotic and eukaryotic gene expression. Sort each characteristic into the appropriate categories:

What I have...

Prokaryotes:
1. mRNAs are degraded quickly
2. Genes are one continuous segment o

ineedhelp123   9742   2 Replies

anonymous 3

You continue your analysis by crossing the Aberdeen White and Kansas Yellow lines. Again, you count

You continue your analysis by crossing the Aberdeen White and Kansas Yellow lines. Again, you count

You study color variants of Arabidopsis hypotheticus, a plant with red flowers. You have obtained three pure-breeding mutant lines, all named for their place of origin. Two lines have white flowers (Aberdeen White and Victoria White), and one has yel

loljaneysaur   9650   9 Replies

okayfine123231l

Recombination and linkage mapping

Recombination and linkage mapping

I need to understand how to construct a recombination and linkage map using the results from a trihybrid map with a total of 450 progeny.

Marsneez   9351   12 Replies

Sam Hormozian

Determining parental and F1 genotypes in crosses involving polygenic inheritance

Determining parental and F1 genotypes in crosses involving polygenic inheritance

You decide to designate the alleles of the four loci as either additive (contributing to fruit segment number and represented by a superscript “+”) or non-additive (not contributing to fruit segment number and represented by a superscript “0”). Using

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KendraJo   9340   26 Replies

Daryam Galan

What is the sequence of DNA strand being synthesized during sequencing?

What is the sequence of DNA strand being synthesized during sequencing?

i posted a pic of the assignment

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ekrieger   9233   14 Replies

biolove

Which of these contribute to heredity, which to genetic variation, or both?

Which of these contribute to heredity, which to genetic variation, or both?

* DNA replication before meiosis
* crossing over
* chromosome alignment in metaphase I and separation in anaphase I
* chromosome alignment in metaphase II and separation in anaphase II
* fertilization

I know that DNA replication is purely hereditary

lenadamelio   9181   2 Replies

aseip