Answered: In hamsters, black fur (B) is dominant…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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In hamsters, black fur (B) is dominant over brown fur (b) and long fur (L) is dominant over short fur (l). A black, long-furred female whose mother had brown fur and whose father had short fur is mated with a black, short-furred male whose father had brown, long fur.

a. What is the probability that the first three offspring will have brown, long fur?

b. What is the probability that the first offspring will have black, long fur?

c. What is the probability that one of the first three offspring will have black, long fur and the other two brown, short fur?

d. What is the probability that the first offspring will have either brown, long fur or black, short fur?

e. What is the probability that the first offspring will have brown, long fur and the second black, short fur?

Expert Solution

Introduction:

Probabilities are calculated in genetic analysis to determine the likelihood of a specific trait or genotype expressing in progeny.
This is based on the principles of Mendelian inheritance, according to which each parent passes one allele (version of a gene) to their offspring, and the phenotype of the offspring is determined by the interaction of the alleles (observable traits).
The alleles that each parent can pass on to their offspring are identified, and the potential allele combinations are then listed, in order to determine the likelihood of a particular trait or genotype showing up in offspring.
Based on Mendelian inheritance principles and the specific dominant and recessive relationships of the alleles involved, the probabilities of each combination are calculated.

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