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1) If the parent cell has 26 chromosomes, how many chromosomes will the each dau

ID: 135908 • Letter: 1

Question

1) If the parent cell has 26 chromosomes, how many chromosomes will the each daughter cell have following meiosis? a. 13 b. 26 c. 52 d. It's impossible to tell 2) A small cell produced during oogenesis that contains a haploid nucleus but little to no cytoplasm is a: a. polar body b. secondary oocyte c.primary oocyte d. spermatid 3) Paired cells in the anther sac of flowering plants are probably undergoing which division? a. meiosis I b. mitosisc.binary fission d. meiosis II 4) The type of cell division that produces daughter cells with entirely new combinations of alleles and/or chromosomes is: a. mitosis b. meiosis s) In which organ does meiosis take place in female animals? b. uterusc. ovary d. pollen sac a. testes 6) Match the events listed with the stage in meiosis during which they occur. Some stages may be used more than once, some not at all. Events: Synapsis occurs Homologous pairs separate and chromosomes move to opposite sides of the cell. Chromosomes line up at the center of the cell individually. Crossing-over happens Tetrads line up at the center of the cell Stages: A. Prophase I B. Prophase lI C. Metaphase l D. Metaphase lII E. Anaphasel F. Anaphase II G. TelophaseI H. Telophase II

Explanation / Answer

13 chromosomes. The number of chromosomes become half during meiosis. During Meioss I the chromosomes undergo gene replication from 2n to 4n and recombination. Post segregation this gives rise to two cells with 2n. and in meiosis two only gene segregation without duplication thus giving 4 daughter cells with half the number of chromosomes. i.e with n ploidy. Thus if you start with 26 chromosomes it will end in 4 cells with 13 chromosomes each. Ploar body. During oogensis the oocyte gives rise to two unequal sized cells after meiosis I and and again during meiosis II. This cell at meiosis I with 2n ploidy, and again at meiosis II with n ploidy. The main oocyte has to store nutrients for the zygote, thus it extrudes out small polar bodies with no cytoplasm to prepare these nutrients for the zygote.

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