A couple is about to have a baby. The man is beta-Thalassemic and the mother is colorblind. What is the possibility the first girl to be colorblind, and what is the possibility for the first boy to be b-thalassemic?

Question

anonymous · Answer

B-Thalassemic is recessive along with colourblindness as far as i know meaning you need both genes to be recessive to exhibit the gene. As it is gender dependent question its sex linked by the sounds of it so.....
I need more info, is the mother a carrier of b-thalassemic if not then the son wont have the condition but has a 50;50 is she is a carrier.
If the father is not colourblind the girl wont either but will be a carrier.

B-Thalassemic; Mother(XX)- gives good gene both times(T), father(XY) gives bad gene(t)
The phenotype; XX(daughter)-Tt, XY(son & Y doesnt carry a gene)- T( located on the X chromosome)

Colourblind; Mother(XX)- colourblind therefore two recessive genes (cc), Father(XY) not colourblind gives one good gene (C)
The phenotype; XX(daughter)- Cc (carrier), XY(son)- c(colourblind)

Like a second opinion, been a while since i have done these