U4T3 – Meiosis

Meiosis

1 / 24

What word describes cells which contain pairs of chromosomes?

Haploid

Diploid

Polyploid

2 / 24

What word do we use to describe the pairs of chromosomes?

Homologous Chromosomes

Homozygous Chromosomes

Sister Chromatids

3 / 24

What word describes cells which contain single chromosomes?

Haploid

Diploid

Polyploid

4 / 24

On this diagram, what does A represent?

Sister Chromatids

Homologous Chromosomes

Sex Chromosomes

5 / 24

On this diagram, what does B represent?

Sister Chromatids

Homologous Chromosomes

Loci

6 / 24

On this diagram, what does C represent?

Loci

Homologous Chromosomes

Centromeres

7 / 24

On this diagram, what does D represent?

Locus

Homologous Chromosomes

Centromeres

8 / 24

Before meiosis starts, the primary spermatocyte or oocyte replicates its chromosomes and organelles. What is this phase called?

Prophase

Anaphase

Interphase

9 / 24

There are now two identical copies of each chromosome, held together by the centromere. Which term best describes these identical copies?

Homologous Chromosome

Sister Chromatids

Homozygous Chromosomes

10 / 24

How many chromatids are present in a human cell at the start of meiosis?

46

69

92

11 / 24

As there are now 4 chromatids in each homologous pair, they are sometimes called what?

Tetrads

Quadrads

Quadrats

12 / 24

Which number represents prophase 1 of meiosis?

3

4

6

13 / 24

Which number represents metaphase 1 of meiosis?

4

5

6

14 / 24

How does metaphase 1, differ from metaphase 2 in meiosis?

The centrioles do not produce a spindle.

The homologous chromosomes are lined up in pairs, not single chromosomes.

The nuclear membrane does not breakdown,

15 / 24

Is Anaphase 2 more similar to Anaphase 1, or Anaphase in mitosis?

More similar to Anaphase 1.

More similar to anaphase in mitosis.

16 / 24

What is the order of events from the diagram for Meiosis division 2?

3, 4, 1, 6

7, 4, 2, 6

6, 7, 5, 2, 8

17 / 24

How is variation introduced during prophase 1?

Independent Segregation

Crossing Over

Mutation

18 / 24

During recombination ( crossing over), genetic material can be swapped between which two structures?

Homologous Chromosomes

Sister Chromosomes

19 / 24

How does recombination increase variation?

It swaps over the same sections of chromosomes, which will contain the same alleles.

It swaps over the same sections of homologous chromosomes, which may contain different alleles.

It swaps genes between different pairs of chromosomes (e.g No21. with 19) , which will contain different alleles.

20 / 24

During Metaphase 1, the homologous pairs can line up with either the paternal chromosome above, or the maternal chromosome above. What is this phenomenon called?

Recombination

Chiasmata

Independent Segregation

21 / 24

How many different combinations of maternal / paternal chromosomes are there if there are 23 pairs?

23 ²

2²³

23²³

22 / 24

What is the main cause of variation between siblings?

Recombination

Mutation

Independent Segregation

23 / 24

A sheep cheek cell which is not dividing has 54 chromosomes, how many chromatids will be present during Meiotic Prophase 1 in the testes?

27

54

108

24 / 24

The goat cardiomyocyte has 30 pairs of chromosomes. How many chromatids will be present in each cell formed at the end of meiosis Telophase 2?

30

15

60

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