Meiosis

Question 1

How many chromosomes and how many chromatids are joined together at the Pachytene stage of prophase I?

Answer 1

2 chromasomes (paired)
(S phase)
4 chromatids

Question 2

What do crossovers do?

Answer 2

Exchange materials between non-sister chromatids on homologous chromosomes

Question 3

A Bivalent consists of….?

Answer 3

2 chromosomes and 4 chromatids

Question 4

At the end of anaphase each chromosome like structure consists of….?

Answer 4

1 chromosome and 2 chromatids

Question 5

Is Prophase 2 similar to prophase in mitosis?

Yes or No?

Answer 5

Yes

Question 6

What happens in S-Phase in Meiosis II

Answer 6

Nothing, there is no S-phase in Meiosis II

Question 7

What would the outcome from Meiosis be if the organism was tetraploid?

Answer 7

4 diploid cells

Question 8

If the sporophyte generation of a higher plant is tetraploid what will the gameteophyte be?

Answer 8

Diploid

Question 9

What are the two main sources of genetic variation in meiosis?

Answer 9

Crossing over and shuffling of maternal and paternal chromasomes