Review Questions

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

1. sexual reproduction involves fewer steps
2. less chance of using up the resources in a given environment
3. sexual reproduction results in greater variation in the offspring
4. sexual reproduction is more cost-effective

Which type of life cycle has both a haploid and diploid multicellular stage?

1. an asexual life cycle
2. diploid-dominant
3. haploid-dominant
4. alternation of generations

Which event leads to a diploid cell in a life cycle?

1. meiosis
2. fertilization
3. alternation of generations
4. mutation

Meiosis produces ________ daughter cells.

1. two haploid
2. two diploid
3. four haploid
4. four diploid

At which stage of meiosis are sister chromatids separated from each other?

1. prophase I
2. prophase II
3. anaphase I
4. anaphase II

The part of meiosis that is similar to mitosis is ________.

1. meiosis I
2. anaphase I
3. meiosis II
4. interkinesis

If a muscle cell of a typical organism has 32 chromosomes, how many chromosomes will be in a gamete of that same organism?

1. 8
2. 16
3. 32
4. 64

The genotype XXY corresponds to:

1. Klinefelter syndrome
2. Turner syndrome
3. Triplo-X
4. Jacob syndrome

Abnormalities in the number of X chromosomes tend to be milder than the same abnormalities in autosomes because of ________.

1. deletions
2. nonhomologous recombination
3. synapsis
4. X inactivation

Aneuploidies are deleterious for the individual because of what phenomenon?

1. nondisjunction
2. gene dosage
3. meiotic errors
4. X inactivation