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Question

Garden peas have 14 chromosomes. Height for pea plants is found on the #4 chromosome. Garden pea’s male and female gametes each have 7 chromosomes. They each donate one #4 chromosome. So the new plant ends up with two #4 chromosomes with the genes for height from their parents on it (one gene from each parent). These two #4 chromosomes are called ________________.

Sister chromatids

Homologous chromosomes

Tetrads

Homozygote

POINT VALUE: 2.0 points

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Which of the following phases of Meiosis do the homologous chromosome pairs line up in the middle of the parent cell?

Anaphase I

Metaphase I

Anaphase II

Metaphase II

POINT VALUE: 2.0 points

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What is the major event that occurs in the Anaphase II stage of Meiosis?

Crossing over occurs.

Chromatids line up in the middle.

Fibers attach to the chromosomes.

Sister chromatids separate to opposite sides of the cell.

POINT VALUE: 2.0 points

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Which of the following phases of Meiosis does the nucleus reform around the haploid number of chromosomes?

Prophase II

Metaphase II

Anaphase II

Telophase II

POINT VALUE: 2.0 points

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Describe "crossing over" in Prophase I and how this can create genetic diversity.

Answer 1

Do your own homework.

Answer 2

Garden peas have 14 chromosomes. Height for pea plants is found on the #4 chromosome. Garden pea’s male and female gametes each have 7 chromosomes. They each donate one #4 chromosome. So the new plant ends up with two #4 chromosomes with the genes for height from their parents on it (one gene from each parent). These two #4 chromosomes are called ________________.

Sister chromatids

Homologous chromosomes

Tetrads

Homozygote

ANSWER  Homologous chromosomes. This means they carry the alleles for the same characteristic on the same location.

POINT VALUE: 2.0 points

--------------------------------------...

Which of the following phases of Meiosis do the homologous chromosome pairs line up in the middle of the parent cell?

Anaphase I

Metaphase I

Anaphase II

Metaphase II

ANSWER Metaphase I. This means that homologous pairs are separated during Anaphase I of Meiosis I.

POINT VALUE: 2.0 points

--------------------------------------...

What is the major event that occurs in the Anaphase II stage of Meiosis?

Crossing over occurs.

Chromatids line up in the middle.

Fibers attach to the chromosomes.

Sister chromatids separate to opposite sides of the cell.

ANSWER  Sister chromatids are separated to opposite sides of the cell. This means that the four .gametes formed will be haploid

POINT VALUE: 2.0 points

--------------------------------------...

Which of the following phases of Meiosis does the nucleus reform around the haploid number of chromosomes?

Prophase II

Metaphase II

Anaphase II

Telophase II

ANSWER  Telophase II. This means when cytokenesis occurs, the result will be four haploid gametes.

POINT VALUE: 2.0 points

--------------------------------------...

Describe "crossing over" in Prophase I and how this can create genetic diversity.

ANSWER  Crossing over is when the two adjacent chromatids of homologous pairs cross over and exchange genetic information. This means that  the gametes formed will contain a combination of genes from both parents leading to variation in the species.

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