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PCAT Biology Reproduction
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PCAT Biology Reproduction
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25 Questions

1. Egg

2. Homologous pairs (tetrads) align at the equatorial plane - and each pair attaches to a separate spindle fiber by its kinetochore

3. Steroid hormones necessary for normal female maturation -stimulate the development of the female reproductive tract and contribute to the development of secondary sexual characteristics and sex drive -responsible for the thickening of the endometrium

4. Meristems provide a source of cells that can develop into an adult plant -can occur naturally or through human intervention -advantagous because it introduces no genetic variation and is a rapid form of reproduction

5. Very similar to mitosis - except that meiosis II is not preceded by chromosomal replication -chromosomes align at the equator - separate and move to opposite poles - and are surrounded by a reformed nuclear membrane -new cells have the haploid number

6. Centromeres split so that each chromatid has its own distinct centromere - thus allowing sister chromatids to separate. The sister chromatids are pulled toward the opposite poles of the cell by the shortening of the spindle fibers. Spindle fibers are

7. Inner layer of oocyte cell membrane

8. (In Prophase I) process where homologous chromosomes (chromosomes that code for the same traits - one inherited form each parent) come together and intertwine

9. Caplike structure - derived from the Golgi apparatus - develops over the anterior half of the head -contains enzymes needed to penetrate the tough outer covering of the ovum

10. Part of embryo that grows and feeds the embryo

11. After ovulation - LH induces the ruptured follicle to develop into the corpus luteum

12. Sperm production -occurs in the seminiferous tubules

13. Produced when each meiotic division -rapidly degenerate

14. Undergoes disjunction

15. The production of female gametes -occurs in the ovarian follicles

16. Two haploid cells yielded from meiotic division of primary spermatocytes

17. Begins with the cessation of the menstrual flow from the previous cycle -FSH (Follicle Stimulating Hormone) from the anterior pituitary promotes the development of the follicle - which grows and begins secreting estrogen

18. Flowering plants consisting of a few cells that exist for a very short time

19. Releases spores form the undersides of its leaves that develop into small heart-shaped gametophytes

20. AKA sperm production -occurs in the seminiferous tubules

21. Central region where - after replication - the chromosomes consist of two identical sister chromatids held together in interphase

22. Undifferentiated tissues in plants

23. The male organ of the flower and consists of a thin - stalk-like filament

24. Ex: estrogens and progesterone -synthesized by ovaries

25. AKA ovanan or fallopian tube -opens into the upper end of the uterus

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