1. The diagram in Figure I shows a section through the mammalian testis. With reference to this diagram answer the following questions: Hormone secreting cells A C FIGURE 1 What percentage of each of the following types of cells would you expect to contain an X chromosome. Give a REASON for your answer in each case. i) type cell A ii) type cell B Name the cell type labelled B which under goes mitosis. State the importance of mitosis in a mature testis.

Biology 2e
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ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter43: Animal Reproduction And Development
Section: Chapter Questions
Problem 2VCQ: Figure 43.15 Which of the following statements about hormone regulation of the female reproductive...
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1. The diagram in Figure 1 shows a section through the mammalian testis. With reference to this
diagram answer the following questions:
Hormone secreting cells
A
FIGURE 1
What percentage of each of the following types of cells would you expect to contain an X
chromosome.
Give a REASON for your answer in each case.
i) type cell A
ii) type cell B
Name the cell type labelled B which under goes mitosis.
State the importance of mitosis in a mature testis.
State TWO ways in which cell division results in cell C being genetically different
from one another.
The graph in Figure 2 shows the effect of light on the period of oestrus in two groups of female
sheep. The females in the control group were subjected to the normal seasonal variation in day
length. Partially through the first year of the experiment, sheep in the experimental group were
subjected to reversed day-length cycle. The period of oestrus of each group of sheep is shown in
solid bands above the graph (Figure 2).
Transcribed Image Text:1. The diagram in Figure 1 shows a section through the mammalian testis. With reference to this diagram answer the following questions: Hormone secreting cells A FIGURE 1 What percentage of each of the following types of cells would you expect to contain an X chromosome. Give a REASON for your answer in each case. i) type cell A ii) type cell B Name the cell type labelled B which under goes mitosis. State the importance of mitosis in a mature testis. State TWO ways in which cell division results in cell C being genetically different from one another. The graph in Figure 2 shows the effect of light on the period of oestrus in two groups of female sheep. The females in the control group were subjected to the normal seasonal variation in day length. Partially through the first year of the experiment, sheep in the experimental group were subjected to reversed day-length cycle. The period of oestrus of each group of sheep is shown in solid bands above the graph (Figure 2).
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