<LCPO> BIOLOGY
<LCPO> BIOLOGY
12th Edition
ISBN: 9781266216398
Author: Raven
Publisher: MCG CUSTOM
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Chapter 20, Problem 1DA

If all white cats died, what proportion of the kittens in the next generation would be white?

Expert Solution & Answer
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Summary Introduction

To determine: Thenumber of white cats produced if all the white cats died in the previous generation.

Introduction: A disorder is the dysregulation or disruption of the structure of the body or function. This is due to the effect of a pathological organism or condition inside the body.

Explanation of Solution

The alleles for the color of the coat of the cat consist of dominant and recessive alleles. The white coat color of the cat is a recessive allele and the black color is the dominant allele. So if the generation consisting of white cats died due to a fatal event, then the number of white cats produced will depend on the number of heterozygous cats that are present in the previous generation. The number of white cats in the subsequent generation can be deduced using Punnett square analysis. The dominant allele for black color in homozygous condition can be “BB” and white color will be “bb”. Hence, the white and black cats produced will be as follows:

GametesBb
B

BB

(homozygous black)

Bb

(heterozygous black)

b

Bb

(heterozygous black)

bb

(homozygous white)

Hence, if all the white cats from the given generation die, then the cross between the two heterozygous black cats will again give black and white cats in the ratio 3:1. So the number of cats produced in the next generation will be ¼ of the total offspring.

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Chapter 20 Solutions

<LCPO> BIOLOGY

Ch. 20.5 - Prob. 1LOCh. 20.5 - Prob. 2LOCh. 20.5 - Prob. 3LOCh. 20.6 - Define frequency-dependent selection, oscillating...Ch. 20.6 - Prob. 2LOCh. 20.7 - Define and contrast disruptive, directional, and...Ch. 20.7 - Prob. 2LOCh. 20.8 - Explain how experiments can be used to test...Ch. 20.9 - Prob. 1LOCh. 20.9 - Prob. 2LOCh. 20.10 - Prob. 2LOCh. 20 - If all white cats died, what proportion of the...Ch. 20 - Assuming that the values on the x-axis represent...Ch. 20 - Prob. 3DACh. 20 - Prob. 4DACh. 20 - Examine the index of copper tolerance on nonmine...Ch. 20 - Prob. 6DACh. 20 - Why are rare alleles particularly likely to be...Ch. 20 - Prob. 2IQCh. 20 - Prob. 3IQCh. 20 - Prob. 4IQCh. 20 - Prob. 5IQCh. 20 - Prob. 6IQCh. 20 - Prob. 7IQCh. 20 - Prob. 8IQCh. 20 - Prob. 9IQCh. 20 - Assortative mating a. affects genotype frequencies...Ch. 20 - When the environment changes from year to year and...Ch. 20 - Many factors can limit the ability of natural...Ch. 20 - Stabilizing selection differs from directional...Ch. 20 - Founder effects and bottlenecks are a. expected...Ch. 20 - Relative fitness a. refers to the survival rate of...Ch. 20 - For natural selection to result in evolutionary...Ch. 20 - Prob. 8UCh. 20 - In a population of red (dominant allele) or white...Ch. 20 - Genetic drift and natural selection can both lead...Ch. 20 - Prob. 3ACh. 20 - Prob. 4ACh. 20 - In Trinidadian guppies a combination of elegant...Ch. 20 - On large, black lava flows in the deserts of the...Ch. 20 - Based on a consideration of how strong artificial...
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