Question 1

Refer to the cell diagram provided. Which phase of mitosis is depicted, and what key event is occurring at this stage?

Accepted Answer

Prophase; chromosomes are condensing and the mitotic spindle is forming.

Question 2

In the cell diagram, what is the primary function of the centrosome during cell division?

Accepted Answer

To organize microtubules and serve as the main microtubule organizing center.

Question 3

Based on the first pedigree (with many blue symbols), what is the most likely mode of inheritance for the trait shown in blue?

Accepted Answer

Autosomal recessive

Question 4

In the first pedigree, if the trait is autosomal recessive, what is the genotype of the parents in the first generation (top row)?

Accepted Answer

Both are heterozygous

Question 5

In the second pedigree (with only one blue symbol in the last generation), what is the probability that the parents of the affected individual are both carriers if the trait is autosomal recessive?

Accepted Answer

100%

Question 6

If the trait in the second pedigree is X-linked recessive, which of the following statements is true about the affected individual (blue symbol, last generation)?

Accepted Answer

The individual must be male and inherited the allele from his mother.

Question 7

Which of the following best describes the role of microtubules during mitosis, as shown in the cell diagram?

Accepted Answer

They attach to chromosomes at kinetochores and help segregate chromosomes.

Question 8

If a mutation prevented the formation of microtubules in the cell shown, what would be the most immediate consequence during cell division?

Accepted Answer

Chromosomes would not be properly segregated to daughter cells.

Question 9

Which of the following statements about centrosomes is correct?

Accepted Answer

Centrosomes duplicate during S-phase to ensure each daughter cell receives one.

Question 10

Which of the following is NOT a function of the cytoskeleton during cell division?

Accepted Answer

Synthesizing DNA

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