In Mice,a Cross Between A^YA⁺ Heterozygotes Produces Two Kinds of Progeny,yellow

question 38

Short Answer

In mice,a cross between A^YA⁺ heterozygotes produces two kinds of progeny,yellow (A^YA⁺)and gray-brown (A⁺A⁺),in a ratio of 2:1.Why is there an altered ratio of individuals produced?
A) A^YA^Yindividuals die during embryonic development due to the presence of a lethal mutation
B) A^YA⁺individuals are physiologically more able to adapt to the birth process
C) A⁺A⁺ individuals are the mutant phenotype and occur more frequently in nature
D) A^YA⁺ individuals are the mutant phenotype and occur more frequently in nature
E) None of these explains why there would be an altered ratio in this case

• A) A^YA^Yindividuals die during embryonic development due to the presence of a lethal mutation
• B) A^YA⁺individuals are physiologically more able to adapt to the birth process
• C) A⁺A⁺ individuals are the mutant phenotype and occur more frequently in nature
• D) A^YA⁺ individuals are the mutant phenotype and occur more frequently in nature
• E) None of these explains why there would be an altered ratio in this case

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Definitions:

Sarcomere

The basic unit of a muscle's cross-striated myofibril, responsible for the muscle's contractile properties.

Actin

A protein that forms filaments and is involved in various types of cell movement and structure, including muscle contraction and cell division.

Resting Membrane Potential

The electrical potential difference across the plasma membrane of a cell in its resting, non-excited state.

Muscle Fiber

An individual muscle cell, known for its elongated form, which contracts to generate movement or maintain posture.