The Importance of Meiosis

Why do people who have the same parents have different traits?

• The children have the same genes, but they just “look differently” because the eggs and sperm age differently as the parents age.

• Reproductive cells undergo meiosis and may not get the same set of genes and traits from each parent.

• The environment makes genes express differently in each person although all the parent’s children will have the same genes.

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NGSS.HS-LS3-2

NGSS.HS-LS3-1

Meiosis produces ______________ daughter cells.

• 2

• 3

• 4

Each daughter cell produced during meiosis contains _______________ the number of chromosomes as the parent cell.

• half

• the same

• twice

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Meiosis produces _____________.

• eggs

• sperm

• spores

• all of these

Meiosis undergoes two separate divisions. In Meiosis I ______________ separate.

• sister chromatids

• homologous pairs

• complimentary DNA strands

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NGSS.HS-LS3-2

Meiosis I and Meiosis II each go through all the following steps except _____________.

• prophase

• metaphase

• anaphase

• telophase

• interphase

During _________________, Crossing-over allows homologous pairs of chromosomes to exchange DNA which is one reason why siblings not alike.

• Interphase

• Prophase I

• Anaphase I

• Metaphase II

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NGSS.HS-LS3-2

In Meiosis II ___________________ separate.

• Sister chromatids

• Homologous pairs

• Complimentary DNA strands

The four unique daughter cells formed by meiosis are called _______________.

• gametes

• diploid cells

• haploid cells

• both a and c

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NGSS.HS-LS3-2

The human diploid number or the number of chromosomes in the parent cells is _______.

• 23

• 46

• 92

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NGSS.HS-LS3-2

NGSS.HS-LS3-1