Meiosis AS

What is the main purpose of meiosis?

• To contribute to genetic variety

• To produce identical body cells

• To repair damaged cells

• To duplicate DNA

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NGSS.HS-LS3-2

How many chromosomes do human gametes have?

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NGSS.HS-LS3-2

Why are gametes haploid?

• To increase the size of the organism

• Because they undergo mitosis

• To repair damaged cells

• To maintain the species chromosome number

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NGSS.HS-LS3-2

What happens during interphase before meiosis begins?

• Chromosomes are reduced to half

• DNA replicates

• Gametes are formed

• Chromosomes are randomly assorted

What phase does DNA replication occur before meiosis?

• Prophase

• Interphase

• Metaphase

• Telophase

What is crossing over and during which phase does it occur?

• Exchange of genetic material in prophase I

• Formation of new nuclei in telophase II

• Separation of sister chromatids in anaphase I

• Exchange of genetic material in prophase II

Tags

NGSS.HS-LS3-2

What is the significance of homologous chromosomes pairing up?

• It leads to genetic diversity

• It ensures DNA replication

• It duplicates chromosomes

• It repairs damaged cells

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NGSS.HS-LS3-2

NGSS.HS-LS4-2

What role does crossing over play in meiosis?

• It repairs damaged DNA

• It increases genetic variation

• It duplicates chromosomes

• It reduces the number of chromosomes

Tags

NGSS.HS-LS3-2

How many cells are formed at the end of meiosis II?

• One cell

• Two cells

• Eight cells

• Four cells

What is the result of meiosis?

• Two identical cells

• Four unique gametes

• One body cell

• Multiple identical gametes

Tags

NGSS.HS-LS3-2