1. A homozygous blue-eyed mouse with short whiskers mates with a homozygous brown-eyed mouse with long whiskers. All of their offspring have brown eyes and short whiskers. Which alleles are dominant? 2. A homozygous five-clawed cat is crossed with a homozygous six- clawed cat and all of the kittens have six claws. Which allele is dominant? 3. In humans, the five-fingered condition is recessive to the six-fingered condition. Yet, most people have five fingers. Explain how this can happen.

Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN:9781305073951
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Chapter13: Observing Patterns In Inherited Traits
Section: Chapter Questions
Problem 13SQ
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Since dominance and recessiveness have intricate biochemical
explanations, the only way of determining dominance is to cross two
individuals that are homozygous (pure) for the two different phenotypes.
This produces the heterozygous condition. Whichever phenotype is
exclusively expressed is said to be the dominant phenotype.
1. A homozygous blue-eyed mouse with short whiskers mates with a
homozygous brown-eyed mouse with long whiskers. All of their
offspring have brown eyes and short whiskers. Which alleles are
dominant?
? QUESTION
2. A homozygous five-clawed cat is crossed with a homozygous six-
clawed cat and all of the kittens have six claws. Which allele is
dominant?
Dominant
3. In humans, the five-fingered condition is recessive to the six-fingered
condition. Yet, most people have five fingers. Explain how this can
happen.
pes not mean
frequent.
Transcribed Image Text:Information Since dominance and recessiveness have intricate biochemical explanations, the only way of determining dominance is to cross two individuals that are homozygous (pure) for the two different phenotypes. This produces the heterozygous condition. Whichever phenotype is exclusively expressed is said to be the dominant phenotype. 1. A homozygous blue-eyed mouse with short whiskers mates with a homozygous brown-eyed mouse with long whiskers. All of their offspring have brown eyes and short whiskers. Which alleles are dominant? ? QUESTION 2. A homozygous five-clawed cat is crossed with a homozygous six- clawed cat and all of the kittens have six claws. Which allele is dominant? Dominant 3. In humans, the five-fingered condition is recessive to the six-fingered condition. Yet, most people have five fingers. Explain how this can happen. pes not mean frequent.
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