A- Answer the following six questions, p lease Identify the letter of choice tha

Question

A- Answer the following six questions, please Identify the letter of choice that best completes the statement or answers the question

1- In mitosis, the main difference between plant and animal cells is that

a. plants do not undergo cytokinesis. b. plants have a central vacuole, while animal cells do not. c. in plants, kinetochore microtubules shorten and draw chromosomes toward the poles; in animals, polar microtubules lengthen to push chromatids apart. d. plants produce a cell membrane in cytokinesis, while animals form a cell plate. e. plants produce a cell plate to segregate the daughter nuclei, while animals form a cleavage furrow.

2- __________ only occur(s) in the gonads to produce gametes. a. Schizogony b. Mitosis c. Meiosis d. Mitosis and meiosis e. Sporogony.

5 - In humans pointed eyebrows are dominant to smooth eyebrows and widow's peak (downward pointed frontal hairline) is dominant to continuous hairline. What phenotypic ratio would you expect in the offspring from a cross between two individual heterozygous for both genes?

a. 9:7 b. 9:3:3:1 c. 1:2:1:2:4:2:1:2:1 d. 9:3:4   e. 1:1:1:1

Explanation / Answer

1.e

The difference is the way in which cytokinesis occurs. Animal cells constricts the cell membrane to pinch and form a cleavage furrow while plant cells eventually build a cell wall between the two daughter cells.

2. meiosis.

Meiosis never occur in somatic cells. it produces haploid cells.

3. telophase

4. anaphase

5. 9:3:3:1

6. prophase

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