Biology - Exam 4 Practice Exam Questions

Day 1

Which type of cell division produces the haploid (1N) gametes (sex cells) that you require for sexual reproduction?

Meiotic cell division

Where does meiotic cell division occur in the human body?

Gonads (ovaries and testes)

Meiotic cell division ensures that each generation of humans inherits exactly

46 chromosomes in the nucleus

Meiotic cell division enables you to produce

Genetically-Variable Haploid (1N) Games

Meiotic cell division increases the genetic variation in sexually reproducing population. How is this beneficial?

Adapt to new environmental conditions

When a human haploid (1N) sperm fertilizes a human haploid (1N) eg, the resulting diploid (2N) zygote has a total of

46 chromosomes

After DNA synthesis, germ-line cells in your gonad have 4 sets of chromosomes. How many times must these cells divide during meiosis to produce haploid (1N) gametes with one set of 23 chromosomes

2

What is an example of a homologous pair of chromosomes in the nucleus of your cells?

Chromosome #17 you inherited from mom and dad

During meiotic cell division, one diploid (2N) germ-line cell in the gonad produces

4 haploid (1N) gametes

Which process generates recombinant chromosomes in prophase I of meiosis I?

Crossing Over

The spindle separates the two pairs of attached homologous chromosomes during

Meiosis I

The spindle separates each pair of sister chromatids and delivers one sister chromatid to oppose ends of the cell in

Meiosis II

During meiotic cell division, crossing over and the random assortment of homologous chromosomes increases

Genetic Variation among gametes

Day 2