In Humans,blue Eyes Are Inherited as a Recessive Autosomal Trait

question 6

Multiple Choice

In humans,blue eyes are inherited as a recessive autosomal trait and color blindness is an X-linked recessive trait.A woman with blue eyes and normal color vision whose father was color blind marries a man who also has normal color vision.He has brown eyes but his mother had blue eyes.Which of the following do you expect to be true for their daughters?

• A)One-half of their daughters will have normal color vision and brown eyes;1/2 of their daughters will have normal color vision and blue eyes.
• B)Their daughters will all have normal color vision and brown eyes.
• C)One-fourth of their daughters will be color blind and have blue eyes,1/4 of their daughters will be color blind and have brown eyes,1/4 of their daughters will have normal color vision and blue eyes,1/4 of their daughters will have normal color vision and brown eyes.
• D)Their daughters will all have normal color vision and have blue eyes.
• E)One-half of their daughters will be color blind and have blue eyes;1/2 their daughters will be color blind and have brown eyes.

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Definitions:

Genes

Segments of DNA located on chromosomes that contain the instructions for the development, functioning, and reproduction of organisms.

Short Tandem Repeat

DNA sequences consisting of a few nucleotides repeated multiple times in a row, used in genetic mapping and fingerprinting.

Polymerase Chain Reaction

A laboratory technique used to amplify segments of DNA for various genetic analyses and applications.

DNA Fingerprinting

A technique used to identify individuals by examining their DNA characteristics, often used in forensic science.