1. A human somatic cell contains _____. a. 45 autosomes and 1 sex chromosome b.

Question

1. A human somatic cell contains _____.

a. 45 autosomes and 1 sex chromosome

b. 21 autosomes and 2 sex chromosomes

c. 44 autosomes and 2 sex chromosomes

d. n chromosomes

e. 22 autosomes and 1 sex chromosome

2. Mitosis results in the formation of _____; meiosis results in the formation of _____.

Select one:

a. four diploid cells ... four haploid cells

b. two diploid cells ... two haploid cells

c. four haploid cells ... two diploid cells

d. two diploid cells ... four haploid cells

e. two diploid cells ... two diploid cells

3.

rossing over is _____.

Select one:

a. making an RNA copy of a DNA strand

b. the exchange of homologous portions of nonsister chromatids

c. the movement of genetic material from one chromosome to a nonhomologous chromosome

d. also referred to as the "independent assortment of chromosomes"

e. a direct consequence of the separation of sister chromatids

4.

What is the function of meiosis?

Select one:

b. none of these

c. to make four cells with the same chromosome number as the parent

d. to make exact copies of the parent cell

e. to make cells with a haploid (half that of the parents) number of chromosomes

5.

Which one of the following occurs in meiosis, but not mitosis?

Select one:

a. A spindle apparatus forms.

b. Homologous chromosomes separate.

c. Sister chromatids undergo disjunction.

d. The nuclear envelope disappears.

e. The cells formed have the same combination of genes as found in the initial cell.

NO EXPLANATION. JUST ANSWERS.

Explanation / Answer

1. A human somatic cell contains c) 44 autosomes and 2 sex chromosomes

2. Mitosis results in the formation of 2 diploid and meiosis results in the formation of four haploid cells. d) option

3. crossing over is b) the exchange of homologous portions of nonsister chromatids

4. c) none of these

5. c) in meiosis sister chromatids undergo disjunction

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