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Biology questions, involving meiosis and sexual reproduction?
-What kind of cell is a gamete?
-What is the advantage of sexual reproduction?
-What are chromosomes made of and how many are there in a human somatic cell in total?
-What combination of sex chromosomes results in a boy? In a girl?
-How many cells are present at the end of meiosis I? at the end of meiosis II?
-What is independent assortment?
-When a sperm & egg fuse to make a zygote, how many copies of each chromosome and each gene will be found in the zygote? Why?
-Why is meiosis necessary for sexual production?
Thanks in advance .
gamete-sexual organ or germ cell
more variability (crossing over)
23 pairs of chrosmosomes plus sex chromosomes
XX male, XY female
2 cells miosis i, 4 cells meiosis ii
the random assortment of chromosomes during the production of gametes, the results are genetically unique individual gametes
46 chromosomes in a zygote 23 from sperm, 23 from egg
meiosis enables all organisms that reproduce sexually to do so without continually multiplying the amount of DNA in the nucleus
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