3.10

Question 1

How many rounds of nuclear divisions are there in meiosis?

Answer 1

2

Question 2

What is produced in meiosis?

Answer 2

4 haploid daughter cells that are genetically varied

Question 3

In flowering plants meiosis forms special male cells called _________

Answer 3

microspores

Question 4

In flowering plants meiosis forms special female cells called __________

Answer 4

megaspores

Question 5

meiosis occurs only in ________

Answer 5

the sex organs

Question 6

Explain Prophase 1 in meiosis

Answer 6

each chromosome appears in the condensed form with two chromatids. Homologous pairs of chromosomes associate with each other. Crossing over occurs

Question 7

What is crossing over (recombination)?

Answer 7

The process by which large multienzyme complexes cut and re-join parts of the maternal and paternal chromatids at the end of prophase 1, introducing genetic variation

Question 8

What is the defenition of fertilisation?

Answer 8

the fusing of the haploid nuclei of two gametes to form a diploid zygote in sexual reproduction

Question 9

What is the name of the sex organs in animals?

Answer 9

gonads (ovary and testis)

Question 10

What are the main steps in the process of meiosis?

Answer 10

Prophase 1
Metaphase 1
Anaphase 1
Telophase 1
Prophase 2
Metaphase 2
Anaphase 2
Telophase 2

Question 11

What is a mutation?

Answer 11

a permanent change in the DNA base sequence of an organisms

Question 12

What is independent assortment (random assortment)?

Answer 12

the process by which the chromosomes derived from the male and female parent are distributed into the gametes at random. Gives genetic variation in daughter cells made in meiosis.