Mitosis, Meiosis, And Patterns Of Inheritance Worksheet (Page 14 of 27) in pdf

Mitosis, Meiosis, And Patterns Of Inheritance Worksheet Page 14

10. In humans, the allele for farsightedness is dominant to normal eyes. A man and a women who are both

heterozygous for the trait, have children. What are the chances of their children being farsighted?

11. In humans, normal skin pigmentation is due to a dominant allele. The recessive allele causes albinism. A

normal skinned man and an albino woman have children. Their ﬁrst child is an albino. Use this information

to answer the following questions:

a. What is the father’s genotype?

b. What is the albino mother’s genotype?

c. What is the albino child’s genotype?

d. What are the chances of these parents having albino children?

12. In sheep, white wool is dominant to black. At times black wool appears in a ﬂock of sheep. Black wool is

worthless because it can not be dyed. How can you eliminate the alleles for black wool in your ﬂock? This is

called artiﬁcial selection. HINT: perform a test cross; term deﬁned on pkt page 11! (text 8.3)

13. Usually, tomato plants have purplish stems, but in some varieties the purple pigment is lacking, and the stem

is green. True-breeding, purple-stemmed tomatoes crossed with green-stemmed plants gave all purple

stemmed F 1 plants. When these plants were back crossed to green-stemmed plants, the offspring were:

482 purple stemmed, 526 green stemmed. Diagram the crosses, showing all genotypes, phenotypes, and

gametes.

Mitosis, Meiosis, And Patterns Of Inheritance Worksheet Page 14