Meiosis

Meiosis

Chapter 11

Multiple Choice

Homologous chromosomes pair along their length during prophase I of meiosis. While two homologues are paired, genetic exchange may occur between them in a process called ________.

• syngamy

• synapsis

• independent assortment

• crossing over

Multiple Choice

Evidence of crossing over can often be seen under the microscope as a structure called a __.

• kinetochore

• centromere

• chiasma

• centriole

Multiple Choice

You are studying meiosis in an organism where 2n=24. How many chromosomes will each nucleus have after meiosis II is complete?

• 24

• 12

• 6

• 48

Multiple Choice

What is a likely evolutionary advantage of sexual reproduction over asexual reproduction?

• Sexual reproduction involves fewer steps.

• There is a lower chance of using up the resources in a given environment.

• Sexual reproduction results in variation in the offspring.

• Sexual reproduction is more cost-effective.

Multiple Choice

Normal human eggs have

• 22 autosomes and an X chromosome

• 22 autosomes and a Y chromosome

• 23 autosomes

• 46 chromosomes