Chromosomal Inheritance

Question 1

What do females and males need for a recessive X-linked trait to be expressed?

Answer 1

Females need two copies of the allele (homozygous) and males need only one copy of the allele (hemizygous)

Question 2

Explain why linked genes are inherited together.

Answer 2

Genes located near each other on same chromosome tend to be inherited together.

Question 3

What results from fertilization of gametes in which nondisjunction occurred? What is it?

Answer 3

Aneuploidy, it is when offspring have an abnormal number of a particular chromosome

Question 4

What is the difference between monosomic zygote and trisomic zygote?

Answer 4

Monosomic zygote has only one copy of a particular chromosome and trisomic zygote has three copies of a particular chromosome.

Question 5

What is the klinefelter syndrome?

Answer 5

It is the result of an extra X chromosome in males, producing XXY individuals

Question 6

What does monosomy X (turner syndrome) produce?

Answer 6

X0 females, who are sterile