10.4 bio

Question 1

Nondisjunction

Answer 1

when chromosomes fail to separate during cell division, resulting in daughter cells with an abnormal number of chromosomes

Question 2

trisomy

Answer 2

a condition where an individual has three copies of a chromosome instead of the usual two.

Question 3

Monosomy

Answer 3

a genetic condition where a diploid organism has only one copy of a chromosome, instead of the usual two copies

Question 4

autosomes

Answer 4

chromosomes in a cell that are not sex chromosomes

Question 5

Sex chromosomes

Answer 5

specific chromosomes involved in determining the biological sex of an organism,

Question 6

How nondisjunction leads to incorrect number of chromosomes

Answer 6

failure of chromosomes to separate properly during cell division

Question 7

What determines human biological sex at birth

Answer 7

he presence or absence of a Y chromosome

Question 8

What happens to a zygote for each type of chromosomal abnormality (deletion, duplication, inversion, translocation)

Answer 8

a loss of genetic material (deletion), an extra copy of genetic material (duplication), a change in the order of genes (inversion), or the movement of genetic material to a different chromosome (translocation)

Question 9

Determine the type of reproductive system (male or female) and the number of Barr bodies produced per cell for a given set of sex chromosomes

Answer 9

For an individual with XX sex chromosomes, they have a female reproductive system and will have one Barr body per cell.