A woman is a carrier of the X-linked recessive color...

Name: Problem 10, Chapter 8: Biology: Science for Life with Physiology
Uploaded: 2022-03-05T21:13:43-08:00
Duration: 1 min 35 s
Channel: Jonathan Temple
Description: A woman is a carrier of the X-linked recessive color blindness gene. She has children with a man with normal color vision. Which of the following is true of their offspring? A. All the males will be color blind; B. All the females will be carriers; C. Half the females will be color blind; D. Half the males will be color blind.

A woman is a carrier of the X-linked recessive color blindness gene. She has children with a man with normal color vision. Which of the following is true of their offspring? A. All the males will be color blind; B. All the females will be carriers; C. Half the females will be color blind; D. Half the males will be color blind.

A woman is a carrier of the X-linked recessive color blindness gene. She has children with a man with normal color vision. Which of the following is true of their offspring?
A. All the males will be color blind; B. All the females will be carriers; C. Half the females will be color blind;
D. Half the males will be color blind.

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Key Concepts

Genotype-Phenotype Relationship

This concept involves understanding how the genetic constitution (genotype) of an individual leads to the observable characteristics (phenotype). In the context of X-linked traits, the interplay between a single X in males and two in females is crucial in determining the presence or absence of a trait.

Carriers

In genetics, a carrier is an individual who harbors one copy of a mutant allele for a recessive trait but does not exhibit the phenotype due to a normal allele. In X-linked recessive conditions, females are typically carriers when they have one mutant and one normal allele.

X-linked Inheritance

This refers to patterns of inheritance where the responsible gene is located on the X chromosome. Because males have one X chromosome and females have two, the transmission and expression of X-linked traits can differ significantly between the sexes.

X-linked Recessive Traits

These traits are caused by genes on the X chromosome that require two copies in females to manifest, but only one copy in males due to their single X chromosome. This often leads to a higher prevalence of the trait in males, as they express the disorder if they inherit the mutant allele.

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