chapter 10

Question 1

how many genes present in the human genome?

Answer 1

tens of thousands

Question 2

specific location of a gene along the length of a chromosome

Answer 2

locus

Question 3

what is a karyotype

Answer 3

a display of all of an individual’s chromosomes arranged in pairs

Question 4

fertilization (which always involves the fusion of gametes) produces

Answer 4

a diploid zygote

Question 5

which can divide by either mitosis or meiosis?

Diploid or Haploid

Answer 5

diploid cells

Question 6

can only divide by mitosis

Answer 6

haploid cells

Question 7

reduces the number of chromosomes by half

Answer 7

meiosis

Question 8

restores the number of chromosomes to the diploid state

Answer 8

fertilization

Question 9

humans have how many pairs of autosomes? How many sex chromosomes?

Answer 9

22, 1

Question 10

when saying an organism is haploid, what is meant?

Answer 10

its cells have a single set of chromosomes

Question 11

are human gametes haploid or diploid?

Answer 11

haploid

Question 12

anaphase I

Answer 12

homologs seperate and migrate towards opposite poles, guided by the spindle apparatus

Question 13

anaphase II

Answer 13

sister chromatids separate and migrate toward opposite poles

Question 14

chiasmata

Answer 14

regions where crossing over has occured

Question 15

homologous pairs of chromosomes orient randomly at

Answer 15

metaphase I of meiosis