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- One day while walking across campus, you see a female butterfly laying fertilized eggs, as shown in the image: 1. What type of ovarioles would the adult female butterfly have (hint: remember the Order of butterflies)? a. Panoistic ovarioles b. Plasmatocytic ovarioles c. Polytrophic ovarioles d. Collaterial ovarioles e. Telotrophic ovarioles 2. Which combination of mechanisms would the butterfly use to supply vitellogenins/maternal mRNAs to the developing oocytes? a. Follicular epithelial cells/trophocytes contained within the follicle b. Apical cells of germarium/nutritive cords c. Follicular epithelial cells/nucleus of the oocyte d. Prefollicular tissue in germarium/trophoocytes that remain in germarium 3. Which statement is correct with respect to the hormonal regulation of the development of the ovaries and vitellogenesis in the adult female butterfly? (Hint: the processes are the same as in a female mosquito.) a.…a.) When in the female life cycle are oocytes produced? b.) Which human hormone(s) are thought to trigger ovulation?Briefly describe the function of the following: - spermatogenic cell
- Define parthenogenesis.8. In the schematic of spermatogenesis below: name the processes A, B, C and D and name the labeled cells. o000- -8 8,88Give reason for the following :(a) The first half of the menstrual cycle is called follicular phase as well as proliferative phase.(b) The second half of the menstrual cycle is called luteal phase as well as secretory phase.
- 4. Martha Peterson is a 16-year-old child who presents to the endocrine clinic. Martha has not had thelarche or menarche, despite her age. She is distraught and states, “All my friends have breasts and look like woman. I still look like a silly little girl. I’ll never find a boyfriend if I look like a boy my whole life.” a. What is the difference between delayed puberty and stalled puberty? b. What other measurements should the nurse take? Why? c. What are the possible causes of delayed puberty? d. What effect does this condition have on Martha’s psychosocial development?discuss the reason for the decline in ovarian germ cells throughout life.6. (a) What are teratogens? (b) Thalidomide is a drug that can inhibit limb development. In what weeks/trimester of pregnancy should thalidomide be avoided?
- 1. Discuss the hypothalamic-pituitary-ovarian axis and the physiologic basis for the interplay of the various hormones involved in the axis. 2. Give the phase of the menstrual cycle and correlate the histologic features seen in the: (a) Endometrium, (b) ovary1. 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).Your friend has a favorite pet mouse named Minnie. Your friend tells you that Minnie recently gave birth to a baby male mouse, but Minnie has (allegedly) never been housed with Mickey, your friends male mouse. Your friend thinks Minnie had given virgin birth. Based on what you know about parthenogenesis, is it possible that Minnie gave virgin birth? Explain. Please help with this question, thank you so much!!:)