BIOL 101 Study Guide - Midterm Guide: Monocotyledon, Plasmid, Plant Cell
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Part ii: three mechanisms exist by which sexual reproduction produces new genotype combinations. One mechanism involves the random combinations of eggs and sperm (fertilization). What are the other two mechanisms and in what stage of meiosis does each occur? (4 points: a. If an organism has a diploid state of 2n=28 chromosomes, what is the number of chromosomes after the first meiotic division? (2 points) b. What is the number of chromosomes after the second meiotic division? (2 points: an individual with the genotype rrqq for two independently segregating loci is crossed with an individual with genotype rrqq. Calculate, using probabilities, the proportion of offspring that will have the genotype rrqq. If these same two genes are linked and there is no recombination, how many genotypes would be found among the progeny of this same cross? (rrqq x rrqq) (2 points: a. i have blood type o.