F13 lecture 2 v2

116 yyrr 116 yyrr 116 yyrr yr 25 parent

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Unformatted text preview: double heterozygote; “dihibrid cross”) A a division A replication B 2nd division 1st a a A pre-meiotic cell (2N) a b b A or 1st division 4N a A B B A A b B b 2nd division A A a b b b 2nd division B 2nd division B a a b A a B 4N B b A B B a B b or a b Independent Assortment two loci illustrated on two different chromosomes (in this case, A/a; B/b double heterozygote) nd A a A replication B 2 1st division a a A pre-meiotic cell (2N) a b or b A or 1st division 4N a A B B A A b B b division A A b 2nd division B 2nd division B a a b b A A 25% B 25% b 2nd a b B a B 4N B division a B b a 25% b 25% the outcome of independent assortment •  each chromosome is inherited independently from other chromosomes –  among the A gametes, 50% are B and 50% are b –  among the a gametes, 50% are B and 50% are b –  etc. •  unliked loci are inherited independently of each other –  we will discus...
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