I was doing this question on inheritance: http://puu.sh/8cuZR.png
(Please tell me if the link doesn't work, I'll reupload) There isn't any further information given other than what's in this screenshot.
Can anyone help me? Here is the mark scheme for this particular question, but I just don't understand it:
3 and 4 produce unaffected male/8 / female/10, so must
but both affected by nail-patella which must be dominant.
3 inherits X from mother, who is not affected;
if sex-linked, 3 would have nail-patella on X chr and
would pass on to all female offspring;
10 is recessive female, so gene not sex-linked.
Inheritance Question Watch
- Thread Starter
- 17-04-2014 18:43
TSR Learn Together
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- 19-04-2014 09:10
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