Question

How can I recognise if it's autosomal dominant, autosomal recessive, x-linked recessive or y-linked recessive?

Answer 1

The best way to overcome this is to think about every single possible scenario for inheritance. This is what I could come up with fast:

x-linked recessive: Can be a little tricky, but basically male offspring are way more vulnerable to x-linked recessive treats. However woman can get the treat by considering a man with the treat and a woman with the treat having a girl who get the treat from both the man and woman.

y-linked recessive: men are the unlucky ones as they are the only one being affected, and 100% of the male offspring should get the y-linked treat.

autosomal dominant: both male and female can have the treat, and there will be no carriers. about 50% of a population in a heterozygous cross and 100% in a homozygous cross.

autosomal recessive: both male and female with equal chance. there will be carriers of the treat and that way it will be able to pass generations without the treat being expressed any offspring in generations.

Answer 2

Just to be clear, when he says 100% of a "homozygous cross" he (or she? frostbte?) means homozygous dominant.

Answer 3

Homozygous for the dominant treat yes. Kind of implied by the question.

Answer 4

Yep, just wanted to make sure no one could get confused. @Frostbite

Answer 5

Thank you so much!