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Consider a diploid cell where 2n = 6. During metaphase I of meiosis, as the pairs of homologous chromosomes line up on the metaphase plate, each pair may orient with its maternal or paternal homolog closer to a given pole. There are four equally probable arrangements of the homologous pairs at metaphase I. (Note that this problem assumes that no crossing over has occurred.)
Distance between shine delgarno and start codon affecting mRNA requirement?
Here's a question that I can't seem to grasp.
There are two mRNAs presented in the 5' to 3' direction, one of which belongs to strain A and the other one belonging to strain B.
Strain A's shine delgarno is further away from the AUG start codon (~17nucleotides) Strain B's shine delgarno is optimal distance from the AUG start co
Crossing lines with the same recessive phenotype What do you get from the result
Gene Interactions 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 yellow flowers (Kansas Yellow). You begin your analysis by crossing each line with wild-type plants and selfin
Assume that during meiosis I, none of the C chromosomes disjoin at metaphase, bu
Assume that during meiosis I, none of the C chromosomes disjoin at metaphase, but they separate into dyads (instead of monads) during meiosis II. Each resultant gamete participated in fertilization with a normal haploid gamete. What combinations will result?
Check all that apply. A) two copies of chromosome A, two copies of chromosome B, four copies of chromos
An experiment was done to determine the linkage relationship of three genes (a,
An experiment was done to determine the linkage relationship of three genes (a, b, and c) in Drosophila melanogaster. Homozygous females phenotypically a, c were crossed with homozygous males phenotypically b. The F1 females were all wild-type in appearance and the F1 males were all a, c. The F1 females and males were crossed to give the following F2 phenotypes and numbers (SEE atta
Probability that II-1 is a carrier of the recessive allele?
The pedigree illustrated below shows an affected II-2 daughter with a recessive inborn error of metabolism. Let B and b represent the dominant and recessive alleles, respectively. What is the probability that II-1 is a carrier of the recessive allele? Use a Punnett square.
Draw a pedigree. Probability of 1st child to have sickle cell anemia?
The autosomal gene for sickle cell anemia (ss) is prevalent among East Africans. Affected individual shave elongated and curved erythrocytes under low oxygen tension because of the polymerization of hemoglobin. Supposing heterozygotes for this gene in this population occur in a frequency of 1 in 8. If a phenotypically normal guy marries a second wife who is also phenotypically norma
Given the pedigree below, what is the probability...?
The pedigree illustrated below (see attached jpeg file) shows a rare autosomal recessive trait. What is the probability that a child of III-4 and III-5 will manifest the phenotype for this trait?
Probability that Kate & Clement's 1st child will be affected with rare disease?
Kate and Clement (II-4 & II-5) met while attending a conference. Their pedigrees are shown below (see attached jpeg file). They both have a sibling who has a rare human metabolic disease. They fall in love at first sight but are anxious about having kids because they know that the chance their first child will be affected is ____. Show your solution.
How to solve lac operon problem? HW due tomorrow midnight!! ><
Hello!
I was wondering if someone can explain how to solve a lac operon problem? The attached picture is the one from our problem sets and the answers are right, I just don't understand how to get the answers.
In Nicotiana, two inbred strains produce long (PL) and short (PS) corollas. These lines are crossed to produce F1, and the F1 are crossed to produce F2 plants in which corolla length and variance are measured. The table summarizes mean and variance of corolla length in each generation.
A cross was made to produce D. melanogaster flies heterozygous for two pairs of
A cross was made to produce D. melanogaster flies heterozygous for two pairs of alleles: A and a, which determine long versus short wings, and B and b, which determine gray versus ebony body color. The following F2 data were obtained: Long wing, gray body 240 Long wing, ebony body 40 Short wing, gray body 40 Short wing, ebony body 80 Test
How do the eight palindromes in the male specific region of the Y chromosome (MS
How do the eight palindromes in the male specific region of the Y chromosome (MSY) prevent the chromosome degeneration that one would predict on the basis of Muller’s ratchet? What role has inversions played in the development of the MSY?
Design a yeast strain that would turn blue when fed...... Please help!
1. Design a yeast strain that would turn blue when fed medium that contains hydrolyzed rice and beans (hydrolysis breaks proteins down to their constituent amino acids) plus threoninol and X-gal. Draw the structure of the gene/mRNA that will give the yeast this phenotype and describe the molecular events that lead to the yeast turning blue on medium containing hydrolyzed rice
When are the major regulatory points in the cell cycle?
early G1 phase (M/G1 checkpoint) late G1 phase (G1/S checkpoint) S phase (S checkpoint) early G2 phase (S/G2 checkpoint) late G2 phase (G2/M checkpoint) M phase (M checkpoint)
Sex linked traits, Two Genes, Two Traits, Complete Dominance
A corn plant that originated from a purple, starchy seed is cross pollinated with a plant that originiated form a yellow, sweet seed. The seeds on a cob from the resulting cross exhibit the following numbers: Purple, starchy --104; Purple, sweet --96; Yellow, starchy --101; and Yellow, sweet --110. Purple and starchy are both dominant alleles. What genotype of the purple starchy see
In cats, an x-linked pair of alleles, B and B', determines the color of fur. The allele "B" for yellow is codominant with B' for black so that BB' cats are tortoise shelled, a splotchy mixture of yellow and black hairs. You and a friend are strolling down the street and see a tortoise shell cat. You bet your
tRNAs involved in the process occupy a series of sites on the complexed chromoso
Once elongation is underway, tRNAs involved in the process occupy a series of sites on the complexed ribosome. The occupation of sites occurs in the following order.
In human gestational develop, abnormalities of the closure of the lower part of
In human gestational develop, abnormalities of the closure of the lower part of the midface can result in cleft lip, if the lip alone is affected by the closure defect, or in cleft lip and palate (the roof of the mouth), if the closure defect is more extensive. Cleft lip and cleft lip with cleft palate are multifactorial disorders that are threshold traits. A family with a his
. You are studying a genetic disorder and find 63 affected siblings in a total
. You are studying a genetic disorder and find 63 affected siblings in a total of 741. The population prevalence of the disorder has been estimated to be 0.0037. Calculate the sibling recurrence risk.
Familial hypercholesterolemia was evaluated in a population by computing the reg
Familial hypercholesterolemia was evaluated in a population by computing the regression coefficient for individuals of various relationships. Calculate the heritability of each of the following relationships.
Relationship Regression Heritability Coefficient (b) Par
Ok no matter how many times i am explained this it makes no sense and its not in the book i use so i have nowhere to turn, can anyone help me understand whats happening with these plates it looks like a bunch of dots to me i don't see how its getting those genotypes from the given information.
An AABbccDdEeFF individual is crossed with an individual with the genotype AaBBC
Question: An AABbccDdEeFF individual is crossed with an individual with the genotype AaBBCCDdEeff. What is the probability that their offspring will have the genotype AaBBCcddEEFf?
Can someone help and explain how to figure this out? thanks,
The table shown lists the approximate new mutation rates for three autosomal dom
The table shown lists the approximate new mutation rates for three autosomal dominant human diseases. Trait Mutations per 106 gametes Retinoblastoma (tumor of the retina) 20 Achondroplasia (statural dwarfism) 80 Neurofibromatosis (tumor of nervous tissue) 220
In a series of 50000 consecutive live births recorded in a
You have 4 primers that can be used for PCR amplification of a 3000 bp plasmid. The locations of the 5’-end of each 20-nucleotide primer is shown in the diagram below. What will be the size of the PCR product when the following pairs of primers are used together in the PCR reaction (if no product will form, write-in 0 bp)
(attached pic) 5. Below is an STR profile for four loci: D8S1179, D21S11, D7S820 and CSF1P0. In the figure below, the upper panel shows all of the identified alleles in the human population (eg. the D8S1179 locus has 12 different alleles) and the lower panel shows the STR profile of John Doe for these 4 loci. a. What is the chance that someone else in the population has
4. The diagram below outlines a molecular test to determine if individuals have the sickle-cell allele. First the region is amplified by PCR and then digested with a restriction enzyme. The two primers are located just to the left of the “1” site and just to the right of the “3” site. a. If the distance between site 1 and 2 is 250bp and the distance between site 2 and 3 is 500b
So I'm trying to figure the number of phenotypic classes that can occur in an F1xF1 cross of 2 different parents one the female being homozygous w,m,f and the male being WT. This is occurring on the 1st chromosome of the D. melanogaster so it is sex-linked.
So I know there are 3 different alleles we are looking at so to get the classes in a non-sex linked chromosome
Wild type, or wt, refers to the genotype that is the typical genotype found in nature. Now read that again. Once more. Now answer. Answer
True False
I PCR out a mutated gene in a patient with nana chorea (the inability to dance in a coordinated fashion) and I compare it to another patient with that same disease phenotype.
I was wondering whether the distance between loci ever change?
For example if eye color was on gene A and pupil size on gene B, the distance between gene A and gene B is 50 cM. Is there a scenario where A and B is not 50?
My teacher said it can, but I don't understand. Isn't the distance between certain genes always fixed?
a)DNA is composed of deoxynucleotides whereas RNA is composed of ribonucleotides. b)Deoxyribose is a ribose with a missing oxygen atom at the 3’-carbon atom. c)The A-T pairing is stronger than the G-C pairing. d)The DNA backbone consists of covalent bonds between sugars and phosphate groups. e)The typica
it looks like a bunch of dots to me i don't see how its getting those genotypes from the given information. 
