Eye colour in humans is controlled by genes. The dominant allele of the gene (B) produces brown eyes. The recessive allele (b) produces blue eyes. A homozygous blue-eyed woman married a homozygous brown-eyed man, and they had three children all with brown eyes. a) Copy the following genetic diagram into your answer book, and i) Show the genotypes of the parents; ii) Complete the following grid using the letters B and b. Woman ..... в Man - b) Explain why all of the children had brown eyes.
Eye colour in humans is controlled by genes. The dominant allele of the gene (B) produces brown eyes. The recessive allele (b) produces blue eyes. A homozygous blue-eyed woman married a homozygous brown-eyed man, and they had three children all with brown eyes. a) Copy the following genetic diagram into your answer book, and i) Show the genotypes of the parents; ii) Complete the following grid using the letters B and b. Woman ..... в Man - b) Explain why all of the children had brown eyes.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Transcribed Image Text:Eye colour in humans is controlled by genes.
The dominant allele of the gene (B) produces brown eyes. The recessive
allele (b) produces blue eyes.
A homozygous blue-eyed woman married a homozygous brown-eyed man,
and they had three children all with brown eyes.
a)
Copy the following genetic diagram into your answer book, and
i)
Show the genotypes of the parents;
ii)
Complete the following grid using the letters B and b.
Woman
b
в
Man
b)
Explain why all of the children had brown eyes.
One of the couple's brown-eyed sons married a brown-eyed
woman and they had five children. Two of the children had blue
eyes and three of the children had brown eyes.
c)
Use a genetic diagram to explain how two of their children came to have blue eyes.
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