10.4

Question 1

What is nondisjunction?

Answer 1

Incorrect number of chromosomes because they didn’t separate proper;y.

Question 2

What is trisomy?

Answer 2

Diploid cells have 3 copies of 1 chromosome type.

Question 3

What is monosomy?

Answer 3

Diploid cells have 1 copy of chromosome.

Question 4

What are autosomes?

Answer 4

Not sex chromosomes.

Question 5

What are sex chromosomes?

Answer 5

Chromosomes that carry sex.

Question 6

What is barr body?

Answer 6

Inactivated x chromosome.

Question 7

What is deletion?

Answer 7

Part of chromosome is gone.

Question 8

What is duplication?

Answer 8

Part of chromosome duplicates.

Question 9

What is inversion?

Answer 9

Part of chromosome reorders.

Question 10

What is translocation?

Answer 10

Part of 2 chromosomes switch.

Question 11

How does nondisjuntion lead to the wrong number of chromosomes?

Answer 11

Some gametes have less and other has more from the chromosomes not separating.

Question 12

What determines human biological sex during birth?

Answer 12

Chromosomes.

Question 13

Is xx male or female and how many barr bodies?

Answer 13

Female, 1.

Question 14

Is xy male or female and how many barr bodies?

Answer 14

Male, 0.

Question 15

Is xxx male or female and how many barr bodies?

Answer 15

Female, 2.

Question 16

Is xxy male of female and how many barr bodies?

Answer 16

Male, 1.