Inglise keel unit 5 answers
intermediates at disadvantage/ora; max 2
[8]
22. (i) crossing over; treat chiasma(ta) as neutral 1
(ii) prophase; 1
(iii) have different, alleles/base sequence of DNA;
A sister chromatids have same alleles/non sister have different alleles 1
[3]
23. two different genes represented in each gamete ie Q or q and R or r;
four correct combinations ie Q and R, Q and r, q and R, q and r; 2
[2]
24
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