nondisjunction

Question 1

The effects of Nondisjunction

Answer 1

• Results in an extra or missing chromosome
• One daughter cell receives a chromosome while the other daughter does not
• Create cancer cells

Question 2

Nondisjunction is caused by

Answer 2

failure of a pair of chromosomes to separate during anaphase of a cell division.

Question 3

When nondisjunction takes place in mitosis….

Answer 3

cancer cells

Question 4

When nondisjunction takes place in meiosis…

Answer 4

gametes have missing of extra chromosome

Question 5

First division nondisjunction

Answer 5

The homologous chromosomes fail to separate, and all of the resulting gametes have an extra or missing chromosome meiosis 1

Question 6

Second division nondisjunction

Answer 6

Sister chromatids fail to seperate,giving rise to gametes with an extra chromosome, a missing chromosome, and normal chromosomes

Question 7

Down syndrome is a result of…

Answer 7

an extra copy of chromosome 21

Question 8

What can increase a person’s risk to down syndrome

Answer 8

The age of the mother.
The cells are stuck in M phases eggs start maturing and the ability of defects happening increases

Question 9

Autosomes or sex chromosomes have a higher fatality rate?

Answer 9

Autosomes because the sex chromosomes defects are not fatal

Question 10

Klinefelter syndrome

Answer 10

XXY male.
Male puberty comes to a halt no growth spurt no sperm

Question 11

Turner syndrome

Answer 11

X female

There is no form of sexual maturation. No menstruation body development comes to a halt.