Question

question 3 (0.5 points)
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when only one chromosome from a homologous pair is present, the cell is said to be in this condition. half the normal number of chromosomes.
a) diploid
b) haploid
question 4 (0.5 points)
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an array of microtubule fibers found in animal cells emerging from the centrosome that act to reinforce the plasma membrane boundary, particularly during anaphase.
a) spindle
b) cleavage furrow
c) cell plate
d) aster

Explanation:

• Question 3:
• A diploid cell has two sets of chromosomes (a homologous pair for each chromosome).
• A haploid cell has half the number of chromosomes (only one chromosome from each homologous pair).
• Question 4:
• A spindle is a structure involved in chromosome separation.
• A cleavage furrow is involved in cytokinesis (cell - division) in animal cells but is not an array of microtubule fibers emerging from the centrosome.
• A cell plate is for plant cell cytokinesis.
• An aster is an array of microtubule fibers emerging from the centrosome that reinforces the plasma membrane boundary, especially during anaphase.

Answer:

• Question 3: B. haploid
• Question 4: D. aster