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Meiosis & Reproduction Practice Test. 1. In meiosis, the DNA is replicated ___. Once Twice Three times Never. 2. Which of these is accomplished by meiosis? Choose all that apply. It allows organisms to replace worn cells. It produces unique gametes.
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1. In meiosis, the DNA is replicated ___. • Once • Twice • Three times • Never
2. Which of these is accomplished by meiosis? Choose all that apply. • It allows organisms to replace worn cells. • It produces unique gametes. • It allows multicelled organisms to get bigger in size. • It allows unicellular organisms to reproduce. • It ensures even distribution of chromosomes.
3. Which of these describes sexual reproduction? • Involves cells from mitosis • Involves cells from meiosis • Offspring are genetic clones • Organisms have 1 set of chromosomes
4. If nondisjunction has occurred during meiosis, which of these is true? • The offspring will be affected. • Crossing-over can’t take place. • The resulting somatic cells will be affected. • There is no effect.
5. Which of these helps to increase variation? Choose all that apply. • Alleles separate • Crossing-over • DNA replication • Independent assortment
6. Which of these does NOT stimulate estrogen & progesterone to release? • Formation of corpus luteum • Fertilization • Ovulation • Implantation
7. Sperm are made in tubes called the ___. • Epididymis • Ejaculatory duct • Seminiferous tubules • Urethra
8. Which of these could NOT take place during ovulation? • Formation of corpus luteum • Fertilization • Increase of LH • Implantation
9. Which of these hormones stimulate the release of estrogen & progesterone? Choose all that apply. • Increased GnRH • Increased HCG • Increased LH • Increased FSH • Increased oxytocin
10. In order for the embryo to implant, what condition must be met? • The endometrium must be thick enough. • The egg has to be released. • The endometrium must be released. • The corpus luteum breaks down.
