Meiosis and Sexual Reproduction

Multiple Choice

Why is it important for gametes to have half the number of chromosomes compared to normal cells?

• To ensure genetic diversity during reproduction

• To prevent the offspring from having too many chromosomes

• To allow for proper cell division

• To make gametes identical to parent cells

Open Ended

Describe the process by which meiosis produces haploid cells from diploid parent cells.

Hotspot

Choose the location on the image where crossing over occurs.

Sex chromosomes fail to separate properly in meiosis

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Klinefelter's Syndrome

Trisomy 21.

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Down's Syndrome

Hotspot

Where does crossing over occur?

Labelling

Meiosis is reductive division. This means that chromosome number is reduced from parent cell to daughter cell. Use this knowledge to complete the diagram.

Drag labels to their correct position on the image

Diploid

Haploid

Match

Match the following

• genetically identical

• genetically diverse

• offspring

• asexual reproduction

• sexual reproduction

DNA is the same

DNA is different

children

1 parent

2 parents

• DNA is the same

• DNA is different

• children

• 1 parent

• 2 parents

Multiple Choice

Nondisjunction can result in 

• trisomy conditions
• monosomy conditions
• additional sex chromosomes
• all of these

Multiple Choice

A pair of identical chromosomes shown in a karyotype, one inherited from mom, and one inherited from dad are called

• sister chromotids
• centromeres
• homologous chromosomes
• autosomes

Multiple Choice

A person with Turner syndrome has only one X chromosome. This means one of their gametes was missing a chromosome.
Which of the following is why gametes sometimes lack a complete chromosome?

• Incomplete dominance
• Nondisjunction
• Inversion mutation
• Substitution mutation

Multiple Choice

Based on the Karyotype shown, at which chromosome can we identify a genetic disorder?

• Chromosome 5

• sex chromosomes

• Chromosome 21

• There are no chromosomal disorders

Multiple Select

Which of the following are true about meiosis?

• It produces four sex cells

• It involves two cell divisions

• Daughter cells are haploid

• Daughter cells are identical to parent cells

Open Ended

Do you have any questions about meiosis and sexual reproduction, or would you like to learn more about how these processes impact genetic diversity?