Meiosis

If an organism has 24 chromosomes in a body cell, how many will each daughter cell have at the end of meiosis?

• 6

• 12

• 23

• 24

Answer explanation

Meiosis reduces the chromosome number by half. Starting with 24 chromosomes in the body cell, each daughter cell will end up with 12 chromosomes after meiosis, making 12 the correct answer.

Tags

NGSS.HS-LS3-2

How many divisions occur in meiosis?

• 0

• 1

• 2

• 3

Answer explanation

Meiosis consists of two rounds of cell division: meiosis I and meiosis II. This process reduces the chromosome number by half, resulting in four haploid cells from one diploid cell, confirming the correct answer is 2.

Which part of meiosis produces diversity in gametes?

• DNA replication

• Prophase

• Crossing-over

• Cytokinesis

Answer explanation

Crossing-over occurs during prophase of meiosis, where homologous chromosomes exchange genetic material. This process creates new combinations of alleles, leading to genetic diversity in the resulting gametes.

Tags

NGSS.HS-LS3-2

How many daughter cells are produced in meiosis?

• 1

• 2

• 3

• 4

Answer explanation

Meiosis produces four daughter cells through two rounds of division: meiosis I and meiosis II. Each round halves the chromosome number, resulting in four genetically diverse haploid cells.

Meiosis produces daughter cells that are genetically _________ each other.

• identical to

• different from

• superior to

• inferior to

Answer explanation

Meiosis is a process that reduces the chromosome number by half, resulting in four genetically different daughter cells. This genetic variation is crucial for evolution and diversity, making the correct answer 'different from'.

Tags

NGSS.HS-LS3-2

If an organism has 30 chromosomes in each body cell, how many will each daughter cell have after meiosis?

• 10

• 15

• 30

• 40

Answer explanation

Meiosis reduces the chromosome number by half. If the organism has 30 chromosomes, each daughter cell will have 30 ÷ 2 = 15 chromosomes after meiosis. Therefore, the correct answer is 15.

Tags

NGSS.HS-LS3-2

The daughter cells produced by meiosis are called __________.

• somatic cells

• stem cells

• germ cells

• gametes

Answer explanation

The daughter cells produced by meiosis are called gametes. These cells are involved in sexual reproduction and include sperm and egg cells, distinguishing them from somatic and stem cells.

Tags

NGSS.HS-LS3-2

What is the purpose of meiosis?

• to help the organism grow

• to repair damaged cells

• to heal injuries

• to create diversity in offspring

Answer explanation

The purpose of meiosis is to create diversity in offspring through the process of genetic recombination and independent assortment, which leads to unique combinations of genes in gametes.

Tags

NGSS.HS-LS3-2

What phase is this?

• Interphase II

• Prophase I

• Metaphase I

• Anaphase II

Answer explanation

Prophase I is the correct phase as it involves the pairing of homologous chromosomes and crossing over, which are key events in meiosis. The other options do not accurately describe this stage.

Tags

NGSS.HS-LS1-4

What phase is shown?

• Prophase II

• Metaphase I

• Metaphase II

• Anaphase I

Answer explanation

The correct answer is Metaphase I, where homologous chromosomes align at the equatorial plane. In Prophase II, chromosomes condense again, while Anaphase I involves separation of homologs, not alignment.

Tags

NGSS.HS-LS3-2