Chapter 9 S

Question 1

What happens during interphase in meiosis

Answer 1

Synthesis of organelles and DNA

Cell synthesises proteins and increase in size

Question 2

What happens during prophase 1 in meiosis

Answer 2

Chromosomes condense and attach to nuclear enevelope

Homologous chromosomes lines up

Nuclear envelope breaks down

Question 3

What happens during metaphase 1 in meiosis

Answer 3

Chromosomes line up on the equator in homologous pairs

Chromosomes cross over when matching regions break and reconnect to other chromosome

Question 4

What happens during anaphase 1 In meiosis

Answer 4

Chromosomes move to opposite poles

Homologous pairs move to opposite pairs but chromatids remain together

Question 5

What happens in telophase 1 in meiosis

Answer 5

Cytokinesis happens

2 daughter cells are made with half the chromosomes of original cell

Meiosis 2 happens but no replication of genetic material

Question 6

What happens in prophase 2 in meiosis

Answer 6

Nuclear membrane and nuclei break up

Chromosomes don’t replicate

Chromosomes go to equator

Question 7

What happens in metaphase 2 in meiosis

Answer 7

Chromosomes line up at the centre

Question 8

What happens in anaphase 2 in meiosis

Answer 8

Sister chromatids spear ate and move towards oppsisute cell poles

Question 9

What happens during telophase 2 in meiosis

Answer 9

Nuclei for at opposite poles

4 daughter cells, each with half the chromosomes as the original cell

Question 10

What’s the founder effect

Answer 10

Occurs when a few individuals from a population colonise a new region

The small number of alleles contained within this population may not be representative of the whole population

The new population is less likely to adapt to changes