In mice the loci for tail length, fur color and whisker shape are found on the...

In mice the loci for tail length, fur color and whisker shape are found on the same chromosome. Long tails (T) are dominant to short tails (t), brown fur (B) is dominant to white fur (b) and straight whisker (S) are dominant to curled whiskers (s). Mice that were homozygous dominant for all three characters were crossed with mice homozygous recessive for all three characters and all of the offspring had long tails, brown fur and straight whiskers. These F1 mice were test crossed. The phenotypes of the offspring from these crosses are shown in the following table.

Tail phenotype	Fur phenotype	whisker phenotype	number of progeny
short	brown	straight	13
long	white	straight	19
short	white	straight	6
long	brown	straight	43
short	brown	curled	22
long	white	curled	15
short	white	curled	46
long	brown	curled	5

a. Use the information in this table to construct a genetic map. Include the distances between the loci on your map.

b. For the data in this table calculate the interference. What does this value mean?

Expert Solution

Ans:

The genotypes which found most frequently are called parental genotypes. So, genotypes T (long tail) B (brown) S (straight) and t (short tail) b (white) s (curled) are the parental genotypes. The genotypes which found less frequently is called double crossover phenotypes. So, genotypes T B s and t b S are the double crossover genotypes.

a. The genetic map is T-23.08 m.u.-S-30.76 m.u.-B.

b. The calculated interference is 0.06. This value means partial interference. The formation of one chiasma partially reduces the probability of another chiasma formation.

All the calculation given below-

gladiator answered 1 year ago

You are studying mice and two genes that control fur and whisker length. Brown fur is...

You are studying mice and two genes that control fur and whisker length. Brown fur is dominant to grey fur (use B or b for alleles) and long fur is dominant to short fur (use F or f for alleles). You are crossing mice that are heterozygous for both genes. What are the gametes that each mice can produce and what are the genotype and phenotype ratios for the offspring?

A scientist estimates the heritability of tail length in a population of mice in Utah and...

A scientist estimates the heritability of tail length in a population of mice in Utah and another population in Iowa. In Utah, the mean tail length is 3 cm. with a heritability of 0.98. In Iowa the mean tail length is 2.5 cm with a heritability of 0.99. what explains the difference between these two populations in mean tail length? a. environmental differences between the populations b. genetic differences between the populations c. both environmental and genetic differences between the...

8. Complete this table to analyze the evolution of dark fur color in rock pocket mice....

8. Complete this table to analyze the evolution of dark fur color in rock pocket mice. Answer these questions. Describe the evidence for A, C and D. A. How has mutation contributed to the evolution of dark fur color in rock pocket mice? (A mutation is a change in a DNA molecule.) How did the researchers establish that a mutation had occurred? B. How does natural selection affect individual mice? Does an individual mouse change its characteristics as a result...

In pegasus genetics, horn length, feather color, and tail length genes are located on the same...

In pegasus genetics, horn length, feather color, and tail length genes are located on the same chromosome. Each gene has two alleles: wild type, which is dominant, or mutant, which is recessive. H is dominant and results in long horns; h is recessive and produces short horns. F is dominant and results in rainbow feathers; f is recessive and produces white feathers. T is dominant and results in a long tail; t is recessive and produces a...

In a population of mice, those with very light fur and those with very dark fur...

In a population of mice, those with very light fur and those with very dark fur are favored. Mice with medium fur are not favored. This is an example of what type of selection? 1. Stabilizing selection 2. Directional selection 3. Disruptive selection 4. Double selection

Black fur color is dominant to white fur color and non-webbed toes are dominant to webbed...

Black fur color is dominant to white fur color and non-webbed toes are dominant to webbed toes. a dog with white fur and web toes is mated with a dog homozygous dominant for both black fur and non-webbed toes. Draw the resulting Punnett square from this cross. What are the genotypic and phenotypic ratios of their offspring.

Dark fur is dominant in pocket mice. A true breeding dark fur mouse is mated with...

Dark fur is dominant in pocket mice. A true breeding dark fur mouse is mated with a true breeding light fur mouse. Their F1 offspring are mated with each other. (a) What is the probability that the first three F2 offspring have dark fur? (b) What is the probability that three out of five offspring will have dark fur? (c) The phenotypes for 50 F2 mice are 30 dark and 20 light. You want to test the goodness of fit...

A female mouse that is heterozygous for fur color where dark fur is dominant to light...

A female mouse that is heterozygous for fur color where dark fur is dominant to light fur and homozygous dominant for long-tail length is mated with a male that is heterozygous for both traits. How many genotypes will be represented in the F1 generation? A. 1/32 B. 1/16 C. 1/8 D. 1/4 E. 1/2

in badgers, fur color is inherited through simple autosomal inheritance, and black fur is dominant to...

in badgers, fur color is inherited through simple autosomal inheritance, and black fur is dominant to white fur. A black badger is crossed with a white badger. In a cete of four kits, all of the kits are black. You have asked to draw a conclusion about the black badger. What is the best conclusion you can draw from this data? a. The black badger is definitely homozygous. b. the black badger is probably homozygous. c. the black badger is...

In rabbits, black fur (B) is dominant over brown fur (b). Normal length fur is determined...

In rabbits, black fur (B) is dominant over brown fur (b). Normal length fur is determined by a dominant gene (R) and a short “rex” by the recessive allele (r). Draw a cross between a homozygous black with homozygous normal length fur and a brown rex rabbit. Do a cross of the F1 generation to determine the phenotypes and genotypes of the F2 generation.

Question