AnswersSY2025-26 - 2002070 MJ Comprehensive Science 2 Sem 1 CRMeiosis

Meiosis Answers

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Which happens during crossing over?

A
Two sex cells join together and combine DNA.
B
Genes are exchanged between two alleles.
C
Genes are exchanged between two egg cells.
D
Chromosomes line up randomly during metaphase I.
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Which best explains the process of meiosis?

A
Meiosis includes cytokinesis, which divides the cell's DNA.
B
Meiosis is a series of steps that divides the cell's cytoplasm.
C
Meiosis includes interphase, which divides the cell's cytoplasm.
D
Meiosis is a series of steps that divides the cell's DNA.
5

Which best explains what happens during crossing over?

A
The chromosomes have electrical connections that allow them to line up randomly.
B
Paired chromosomes overlap and portions of DNA switch between chromosome.
C
Genetic material is switched because the chromosomes line up independently.
D
Chromosomes line up randomly and cross genetic information between unpaired chromosomes.
6

Which activities occur during prophase II? Check all that apply. DNA condenses to form chromosomes.Each chromosome pairs up with its mate.Spindle fibers form.Chromosomes move to the opposite end of the cell.The nuclear envelope disappears.

A
DNA condenses to form chromosomes.
B
Each chromosome pairs up with its mate.
C
Spindle fibers form.
D
Chromosomes move to the opposite end of the cell.
E
The nuclear envelope disappears.
7

Which best describes what happens between meiosis I and meiosis II?

A
Crossing over occurs.
B
Cells enter into interphase.
C
Cells directly enter prophase II.
D
The number of chromosomes is doubled.
8

An organism has 20 chromosomes after fertilization. After meiosis, how many chromosomes would each sex cell have?

A
5
B
10
C
20
D
40
9

Which are processes that add to the genetic differences in siblings? Check all that apply. interphaseindependent assortmentcytokinesiscrossing overmitosis

A
interphase
B
independent assortment
C
cytokinesis
D
crossing over
E
mitosis
10

A kangaroo has a diploid number of 16. After meiosis, how many chromosomes would be in each cell?

A
4
B
8
C
16
D
32

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Meiosis Answers — SY2025-26 - 2002070 MJ…