PART A

Question

Which of these would best fill in the chart for "B"?
Responses
A 0 chromosomes0 chromosomes
B 23 chromosomes23 chromosomes
C 46 chromosomes46 chromosomes
D 69 chromosomes69 chromosomes
Question 2
PART B
Which of these best describes why your answer Part A must occur every time?
Responses
A Mitosis triples the number of chromosomes to give new cells a better chance of survival.Mitosis triples the number of chromosomes to give new cells a better chance of survival.
B Deletion of chromosomes through mitosis is essential to maintain a species in the future.Deletion of chromosomes through mitosis is essential to maintain a species in the future.
C Mitosis forms sperm and eggs which must have half then number of chromosomes as the original.Mitosis forms sperm and eggs which must have half then number of chromosomes as the original.
D In order to maintain genetic continuity, it is important that mitosis create new cells with the same number of chromosomes as the original cell.In order to maintain genetic continuity, it is important that mitosis create new cells with the same number of chromosomes as the original cell.

Answer 1

For Part A, the best answer for "B" would be:

B: 23 chromosomes

This is because "B" likely refers to the number of chromosomes in a gamete (sperm or egg), which is half the number of chromosomes found in somatic (body) cells, which typically have 46 chromosomes.

For Part B, the best explanation for why your answer in Part A must occur every time is:

C: Mitosis forms sperm and eggs which must have half the number of chromosomes as the original.

This explanation highlights that during the formation of gametes, specifically through meiosis (not mitosis), the chromosome number is halved to ensure that when fertilization occurs, the resulting zygote has the correct diploid number of chromosomes.