Integrated Science
Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Textbook Question
Chapter 26, Problem 1CQ

What is the probability of each of the following sets of parents producing the given genotypes in their offspring?

Chapter 26, Problem 1CQ, What is the probability of each of the following sets of parents producing the given genotypes in

(a)

Expert Solution
Check Mark
To determine

The probability of parents having genotype AA and Aa will produce 3 offsprings with genotype aa.

Answer to Problem 1CQ

A cross between parents having genotype AA and Aa will have zero probability of producing three offsprings with genotype ’aa’.

Explanation of Solution

Punnett square is used in genetics to determine the probability of a progeny’s genotype and phenotype. It is a box figure on which the alleles of each parent are listed. A cross between the parents gives the genotype or phenotype of each progeny.

In this case,

The genotype of one parent is AA and the genotype of other parent is given as Aa. A cross between these parents can be depicted through Punnett square:

 AA
AAAAA
aAaAa

The probability that the cross will produce three progeny with genotype aa is zero.

(b)

Expert Solution
Check Mark
To determine

The probability of parents having genotype Aa and Aa will produce 3 offsprings with genotype Aa.

Answer to Problem 1CQ

A cross between parents having genotype Aa and Aa has probability of 18 for producing three offsprings with genotype Aa.

Explanation of Solution

The genotype of one parent is Aa and the genotype of other parent is given as Aa  A cross between these two parents can be depicted through Punnett square:

 Aa
AAAAa
aAaaa

The probability of offsprings having genotype Aa is 24. Therefore, the probability that three offsprings will have genotype Aa is:

24×24×24=864=18

(c).

Expert Solution
Check Mark
To determine

The probability of parents having genotype Aa and aa will produce 3 offsprings with genotype Aa.

Answer to Problem 1CQ

A cross between parents having genotype Aa and aa has 18 probability of producing three offsprings with genotype Aa.

Explanation of Solution

The genotype of one parent is Aa and the genotype of other parent is given as aa A cross between these two parents can be depicted through Punnett square:

 Aa
aAaaa
aAaaa

The probability of offsprings having genotype Aa is:

24×24×24=864=18

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