Meiosis

Question 1

what are some things that happen during meiosis

Answer 1

• chromosome number in the nucleus is halved

- the daughter cells formed have only one set of chromosomes and are not identical to each other or the mother cell

Question 2

what happens in meiosis i

Answer 2

the chromosome number is halved and genetic material is exchanged

Question 3

what happens in meiosis ii

Answer 3

the daughter cells, chromosomes and chromatids separate from each other

Question 4

prophase i

Answer 4

homologous chromosomes arrange themselves into pairs and form bivalents

Question 5

metaphase i

Answer 5

bivalents arrange themselves on the equator

the chromosomes lie on a double row on either side of the equator

Question 6

anaphase i

Answer 6

homologous chromosomes are separated

each chromosome moves to opposite sides of the equator

Question 7

telophase i

Answer 7

chromosomes group themselves at the poles

spindle fibre disappears

Question 8

what is the purpose of meiosis

Answer 8

to ensure genetic variation

Question 9

what is genetic variation and how it is accomplished

Answer 9

the differences that occur as a result of different gene combinations

• crossing over and the exchange of genetic material during prophase i
• random arrangement of chromosomes on the equator during metaphase i

Question 10

define aneuploidy

Answer 10

extra chromosomes or missing chromosomes in a cell

Question 11

non-disjunction is also known as

Answer 11

chromosome mutations / abberations / abnormal meiosis