Introduction to Genetic Analysis
Introduction to Genetic Analysis
11th Edition
ISBN: 9781464109485
Author: Anthony J.F. Griffiths, Susan R. Wessler, Sean B. Carroll, John Doebley
Publisher: W. H. Freeman
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Chapter 3, Problem 38P
Summary Introduction

To determine: The explanation for the presence of light-colored moth obtained from the crossing of dark female and dark male moth.

Introduction. The genotype is the genetic constitution of the organism while the phenotype is the external characters visible in an organism.

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In currant moths, their Light color is sex-linked and recessive (d) to dark color (D). Question: What are the genotype and the phenotype of the parents if a certain cross yields ½ dark and ½ light colored females and all dark males? Take note that female moths are heterogametic.
A cross between two red flower plants produces 2/3 progeny that are red and1/3 progeny that are yellow. What is the genotype of the red flower? Explain these unexpected ratios.
In currant moths, their Light color is sex-linked and recessive (d) to dark color (D). What are the phenotypes and genotypes of the parents if a certain cross yields ½ dark and ½ light colored females and all dark males? Female moths are heterogametic. Show COMPLETE cross.
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