Log in
Biology
4
answers
0
watching
103
views

Short hair is a dominant trait in rabbits; long hair is recessive. A cross between a short-haired 

female and a long-haired male produces a litter of one long-haired and seven short-haired bunnies. 

  1. a) What are the genotypes of the parents? b) What phenotypic ratios were expected amongst the offspring? c) How many of the eight bunnies were expected to be long-haired? 

Watch
4
answers
0
watching
103
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share

Related textbook solutions

Molecular Cell Biology
8 Edition,
Lodish
ISBN: 9781464183393
Biology: Science for Life with Physiology
6 Edition,
Belk
ISBN: 9780134555430
Biology
2nd Edition, 2013
Openstax
ISBN: 9781947172517
Concepts of Biology
OER Edition,
Openstax
ISBN: 9781938168116
Essentials of Biology
5 Edition,
Mader
ISBN: 9781259660269

Related questions

I need to finish this by today. The dihybrid squares I can do butcan someone show me how to do this? I have no time :( care to help?please? (:

1. In guineaa pigs, long hair (L) is dominant to short hair (l).Black color (B) is dominant to albino (b). A heterozygous longhair, albino male is bred to a short haired black female. What arethe probable genotypic and phenotypic ratios of theiroffspring?

Well we have to make 2 dihybrid squares. And I have no idea how todo this..... :(

1. (8 points) Anhydrotic ectodermal dysplasia is an X-linked recessive disease in cattle, causing tooth abnormalities and hairlessness. Arachnomelia is an autosomal recessive condition that causes spider legs in newborn calves. Use ‘D’ to indicate the dominant, normal teeth and hair in cattle and ‘d’ for the dysplasia. Use ‘L’ for normal legs and ‘l’ for spider legs. Suppose a heifer having normal teeth and hair and normal legs but whose sire had dysplasia and spider legs is backcrossed to her sire.

a. What are their genotypes?

b. What are the genotypes, phenotypes, and genotypic and phenotypic proportions we expect in their progeny?

2. (6 points) In German Shepherds, hemophilia A is an X-linked recessive disease, affecting the blood clotting times in dogs having the disease. Use ‘+’ to indicate the normal, normal blood clotting time allele and ‘a’ for the hemophilia allele. A bitch (female) who has normal blood clotting times and whose sire (male) had hemophilia A is mated with a sire with normal blood clotting times but whose sire also had hemophilia A.

a. What are the genotypes of the 4 dogs described in the problem?

b. What are the genotypes, phenotypes, genotypic and phenotypic proportions you would expect to observe in the puppies produced from this cross?

3. (8 points) In turkeys, inhibited feathering is a sex-linked dominant gene (F). Use ‘f’ to denote the normal feathering allele. Suppose a bald hen (female) is crossed with a normally feathered rooster.

a. What are the genotypes of the two birds described?
b. What are the genotypes, phenotypes, genotypic and phenotypic proportions expected in the F1 progeny? c. What will be the genotypes, phenotypes and proportions produced when the F1 males are backcrossed?

4. (8 points) In guinea pigs, short hair (H) is dominant to long hair (h) and the heterozygous condition when you cross a yellow coat (CY) and white coat (CW) gives you a cream coat. These two loci are located on different chromosomes. A heterozygous short-haired cream guinea pig is crossed to a long-haired white guinea pig.

a. What are the genotypes, phenotypes and proportions of the pups (baby guinea pigs) produced?

b. What are the genotypes, phenotypes and proportions expected if we crossed the heterozygous short- haired cream guinea pig with a heterozygous short-haired yellow guinea pig?

4. Short hair in rabbits is governed by a dominant gene (L) and long hair by its recessive allele (l). Black hair results from the action of the dominant genotype (B-) and brown from the recessive genotype (bb).

a). In crosses between dihybrid short, black and homozygous short, brown rabbits, what genotypic and phenotypic ratios are expected?

b). Determine the expected genotypic and phenotypic ratios in progeny from the cross LlBb x Llbb.

Hi, Can you please explain clearly. Thank you.

Weekly leaderboard

Home
Homework Help 3,900,000
Biology 460,000
Start filling in the gaps now
Log in