pedigrees (1 Viewer)

[stressedadfff]

hey guys i thought it would be a, if not how do we know its b?

 

[dasfas]

Well it's definitely not C, because individuals II7, II3 could not have an unaffected child if the disease was recessive

Thus it's either autosomal or sexlinked dominant.

If it's autosomal dominant, then both II7 and II3 must be heterozygous for there to possibly be an unaffacted child. Likewise for sexlinked dominant. Hence it's B

So it's not A because it could be autosomal OR sexlinked dominant

 

[stressedadfff]

Well it's definitely not C, because individuals II7, II3 could not have an unaffected child if the disease was recessive

Thus it's either autosomal or sexlinked dominant.

If it's autosomal dominant, then both II7 and II3 must be heterozygous for there to possibly be an unaffacted child. Likewise for sexlinked dominant. Hence it's B

So it's not A because it could be autosomal OR sexlinked dominant

thank you

 

[stressedadfff]

could someone pls explain the following and how its c

 

[stressedadfff]

Stress how did you get access to this question? This is from my one friends schools 2021 practice trial

lol my teacher uploaded