Genetics and Developmental Biology

What phyla would a hybrid of sheep and octopus be classified in?

What phyla would a hybrid of sheep and octopus be classified in?

I know it's a fictional hybrid, but for science class we need to create a hybrid cross of two animals. And we need to answer all these questions, including: " Which phyla do you think your organism would be classified in? Explain your reasoning. " Pl

rkay9241   446   3 Replies

rkdgh2002

Drosophila hybrid cross F2 Generation?

Drosophila hybrid cross F2 Generation?

I have an experiment in genetics involving Drosophila (fruit flies) and sex linked traits.

W = red eyes
w = white eyes

M = regular wings
m = miniature wings

F = regular hairs
f = forked hairs

These are all sex-linked traits. I want to make sure t

firestorm   689   1 Reply

rlcdiver11

Hybrid organisms produced from a cross between two pure-breeding organisms belong to which generation?

Hybrid organisms produced from a cross between two pure-breeding organisms belong to which generation?

A. H1
B. A1
C. F1
D. F2

rlemus87   1623   2 Replies

julesh22

Question on Hybrid/Cross Breeding? Thanks !!!!?

Question on Hybrid/Cross Breeding? Thanks !!!!?

The common red fox has 34 chromosomes in its somatic cells, but the arctic fox has 52.
They can be crossed to yield a hybrid form. How many chromosomes would you expect to find in the somatic cells of the hybrid fox?

Possible Answers (since this is

rlcdiver11   444   2 Replies

rld0015

Are lichens a cross-kingdom species , that is a hybrid of fungi and algae (protists)?

Are lichens a cross-kingdom species , that is a hybrid of fungi and algae (protists)?

I don't know why lichens are said to be possess both fungi and algae characteristics.

Please help me with this: Algae perhaps because it is photosynthetic, ?

And why fungi?

Thanks a lot!

rlcdiver   591   1 Reply

irina

Please HELLPPPP Easy mono hybrid cross involving incomplete dominance.. but don't know how to get pheno ratio?

Please HELLPPPP Easy mono hybrid cross involving incomplete dominance.. but don't know how to get pheno ratio?

I'm sooo frustrated with genetics! I need help.. and I know it's probably something simple to solve... but I have this question about how to get ratios..... like a 1:2:1.... what numbers could generate this... For example take a look at this problem.

MicroMan84   459   2 Replies

firetruckboom

PLEASE what is the easiest way to get the F2 genotypes of the offsprings in a multi-hybrid cross at F2 GENERAT?

PLEASE what is the easiest way to get the F2 genotypes of the offsprings in a multi-hybrid cross at F2 GENERAT?

Example: TTRRYY  *   ttrryy

rlalonie28   351   1 Reply

irina

Biology Di-hybrid cross question (please help)?

Biology Di-hybrid cross question (please help)?

Using the rule of independent events and the product rule, consider the probabilities for the following Di-hybrid cross.
Some dogs bark while others are silent when trailing prey. The barking characteristic is due to a dominant gene (B). Erect ears (

juliabreslin   455   1 Reply

micromarc

whats the difference between amono hybrid cross a dihybrid cross? how are they similar?

whats the difference between amono hybrid cross a dihybrid cross? how are they similar?

whats the difference between amono hybrid cross a dihybrid cross? how are they similar?

fire_crystal   789   3 Replies

firetruckboom

What is the relationship between VNTRs, RFLPs, and SNPs?

What is the relationship between VNTRs, RFLPs, and SNPs?

What is the relationship between VNTRs, RFLPs, and SNPs?

selfstudy   9006   3 Replies

duddy

Given a plant with the genotype Aa; bb; Cc; Dd; ee,

Given a plant with the genotype Aa; bb; Cc; Dd; ee,

(a)how many different phenotypic classes will result following selfing of this plant?

AabbCcDdee x AabbCcDdee
Reading these forums, I came up with:
n=the number of heterozygous genes
2^n = the number of phenotypic classes.

laniyar   1934   2 Replies

laniyar

How do you draw a punnett square for a cross between two individuals from the F1 generation?

How do you draw a punnett square for a cross between two individuals from the F1 generation?

I have a box and on one side it gives me rS and on the other side I have one rS.  It is a sixteen square box
It's not a cross between rS and rS it is a 16 square punnett square and they give you two of them.  On one side of each square there is rS an

nymomo789q   987   1 Reply

micphy

Can someone give me a punnett square or something along those lines for blood types?

Can someone give me a punnett square or something along those lines for blood types?

I know that 2 blood types (aka 2 parents) can only produce a set range of blood types in their offspring, and I need to know what produces what, and what kinds of blood types are not possible when combining 2 together. This is actually pretty importa

datboililp   547   2 Replies

nyno2010

How do you organize Punnett squares if you're crossing Heterozygous with Homozygous?

How do you organize Punnett squares if you're crossing Heterozygous with Homozygous?

Having a spot of trouble with biology, the example used here is RrBb X RRBB
where R stands for the dominant variation of running mouse (able to run in a straight line) and r stands for waltzing mouse (only walks in circles). B = black hair b= brown h

micro01   574   2 Replies

nynie123

How to do a punnett square?

How to do a punnett square?

I have a test today and I'm not very good with punnett squares. Do you know of any tips/tricks or rules that could help me?

nyonisikha   525   1 Reply

nypharm

how do i do a punnett square for breast cancer?

how do i do a punnett square for breast cancer?

i have a science project on genetic disorders...i was assigned breast cancer. for one part, i'm asked to do a punnett square for someone who would have the disorder. she didnt teach us punnett squares haha so..help?

micphy   1473   1 Reply

Datchile

Biology help-fill out a punnett square for this scenario?

Biology help-fill out a punnett square for this scenario?

Scenario: In reebops, red nose is dominant over black nose. If a homozygous red-nosed reebop mates with a heterozygous red-nosed reebop, what is the probability that their child will have a black nose? Draw a punnett square and write how many would h

micmac63   889   1 Reply

nyno2010

How to set out FFxff on a punnett square?

How to set out FFxff on a punnett square?

I have a diagram of a punnett square and it says purple-flowered peas are crossed with white-flowered pease and then it has purple represented as FF and white represented as ff, what goes on the top and what goes at the side?                        

nynie123   564   2 Replies

micphy

Make a Punnett square A heterozygous orange flowered plant is crossed with a homozygous white flowered plant.?

Make a Punnett square A heterozygous orange flowered plant is crossed with a homozygous white flowered plant.?

Orange flowers are dominant.

a. Draw the Punnett square
b. What percentage of the offspring will be orange?
c. What percentage of the offspring will be white?
d. What is the genotype of the orange plants?
e. What is the genotype of the white plan

micro01   1054   1 Reply

nynkh

how Gregor Mendel use pea plants for his experiment on heredity?

how Gregor Mendel use pea plants for his experiment on heredity?

i was listen to my biology teacher talking about this, the only part i think know its that, tall + tall= tall tree, and short + short= short tree. i didn't understand the reason why. can you guy please explain to me!

MiiMee   4315   1 Reply

millertime722

Transposable Elements

Transposable Elements

Discuss the similarities and differences of transposable elements in E. coli, yeast, plants, and Drosophila. How does it act and jump around in DNA?

selfstudy   4112   2 Replies

selfstudy

Has anyone taken the final from UC Berkeley for genetics?

Has anyone taken the final from UC Berkeley for genetics?

Has anyone taken the final from UC Berkeley for genetics? I have no idea how to start studying for this!

Also does anyone have their old homework to the assignments that they could post??

selfstudy   2848   2 Replies

selfstudy

Help plz genetics cross

Help plz genetics cross

Two true breeding white strains of the plant ilgett... were mated and the f1 progeny were all white. When th f1 was allowed to self fertilze 126 white flowered and 33 purple flowered f2 plants grew.


How could you describe the inherit

znny23   3401   3 Replies

znny23

molecular biology:does anyone can help me to solve this problem.

molecular biology:does anyone can help me to solve this problem.

I have a molecular biology question, can you help me to solve it?

You have cloned a cDNA molecule in the EcoRI and PstI sites of pBR322. Which bacterial strain (XLI-blue or JM105) are you going to use for the transformation experiment and

wywz2007   2986   3 Replies

wywz2007

UV induced dimers in a gene

UV induced dimers in a gene

It has been shown that the repair of UV induced dimers in a gene is coupled to transcription. Suggest a model for this and any experiments you would use to test your model.

selfstudy   1499   2 Replies

selfstudy

How do you determine recombinant frequency for 2 genes on the x-chromosome?

How do you determine recombinant frequency for 2 genes on the x-chromosome?

I understand how to determine RF for genes that are autosomal but cannot figure out how to do it for x-linked genes. Since males only have one X chromosome they can only have one allele of the gene and therefore cannot be recombinants. So if only fem

BuhReddy   2606   1 Reply

sperl

Discuss some of the physiological and physical factors that contributes to lact

Discuss some of the physiological and physical factors that contributes to lact

Rachael Martin is an avid runner and athlete at a large university and has been given a scholarship to participate in women's track. Sometimes she is uncomfortable to the point of pain after her workouts. She reports that the pain is probably du

Kiwi420   3778   3 Replies

bio_man

How would one distinguish a chromatid from a chromosome?

How would one distinguish a chromatid from a chromosome?

a) A chromatid is the portion of a chromosome on each side of its centromere.
b) A chromatid is the portion of a chromosome on each side of its kinetochore.
c) A chromatid is a twin of another chromatid resulting from chromosomal copying, both being

irina   1797   3 Replies

bio_man

What chromosome is the gene for dimples found on?

What chromosome is the gene for dimples found on?

I need to know, for a science project due tomorrow, what chromosome the dimple gene can be found on. Can anyone link me to this information? I'm having trouble finding it.

lex6909   3092   3 Replies

bio_man

How does one DNA strand become a chromosome?

How does one DNA strand become a chromosome?

A gene is a segment of DNA strand.  On each DNA strand are dozens of thousands of genes.  One DNA strand will coil up and condense during mitosis, and that becomes one chromosome.  How does one DNA strand "become" a chromosome?

rjay92   4391   1 Reply

buggyg69

How did the Y chromosome come into being?

How did the Y chromosome come into being?

If the Y chromosome is suceptible to defective genes, why didn't they eventually die and humans would have XX ?

Rj55   1396   1 Reply

rj.lall

How many types of chromosome does eukaryotic cell contain?

How many types of chromosome does eukaryotic cell contain?

1:structural changes in the chromosome?
2:give also its cytologically and genetically effect of each type?
3:which nucleic acid control the features and functions of an organisms?

jules_1978   1740   1 Reply

rk90

What is the difference between a chromatid and a chromosome?

What is the difference between a chromatid and a chromosome?

I do get if a chromatid is a half a chromosome?

julesarth   3350   2 Replies

lex6909

Which of the following statements about chromosome structure and function is false?

Which of the following statements about chromosome structure and function is false?

A) Telomere sequences are found at the ends of chromosomes.
B) Remodeling of chromatin structure can alter gene expression.
C) A chromosome has a single DNA molecule.
D) Short tandem repeats are an example of noncoding DNA
E) All of the above are tru

lex   1981   2 Replies

Julian

What is the difference between an allele and a chromosome?

What is the difference between an allele and a chromosome?

I dont really know the differences between them. Is a chromosome a pair of alleles?

julesarth   1135   3 Replies

rjframe

What does the number of possible chromosome combinations vary by species?

What does the number of possible chromosome combinations vary by species?

a. homologous chromosome pair up differently in different species.
b. crossing over occurs in some species but not in others.
c. not all species form gametes by meiosis.
d. different species have different numbers of chromosomes.

lexaebrown   1308   1 Reply

lewywong

what exactly is a chromosome? what happens to chromosomes during cell division?

what exactly is a chromosome? what happens to chromosomes during cell division?

I'm revising the cell cycle right now and I am really confused about the structure of a chromosome. I don't really understand what a chromatin or a chromatid is, all I know is that a chromosome is a the genetic material after the DNA helix was wrappe

rjandmj82   1326   3 Replies

lexiseller12

Why is it necessary for chromosome number to be halved during meiosis?

Why is it necessary for chromosome number to be halved during meiosis?

Why is it necessary for chromosome number to be halved during meiosis?  What would happen to offspring if this reduction in chromosome number didn't occur?

I need an essay.

BuhReddy   7876   4 Replies

jules_1978

How do chromosome find their match pairs?

How do chromosome find their match pairs?

Like during Meosis, the Chromosomes pair up in preperation for division. But how does the chromosome knows which other chromosome to match up with?

Rkamu   579   1 Reply

rkahn

How do males and females differ in their sex chromosome?

How do males and females differ in their sex chromosome?

If:
a) Males have a Y chromosome and females have an X chromosome
b) Males have a X chromosome and females have an Y chromosome
c) Males have a XY chromosome and females have an XX chromosome
d) Males have XX chromosome and females have an XY chromos

RJW   820   4 Replies

buhlig