Biology help! Please :]?

1.] Because the gene for red-green color blindness is located on the X-chromosome, it is normally not possible for a:





A]carrier mother to pass the gene on to her daughter.





B]carrier mother to pass the gene to her son.





C]color blind father to pass the gene on to his daughter.





D]color blind father to pass the gene on to his son.





2.] Eye color in humans is the result of __________ inheritance.





A]multiple allelic





B]polygenic





C]sex-linked





D]simple dominant





3.] The blood types A,B,AB, and O are the result of__________ inheritance.





A]multiple allelic





B]polygenic





C]sex-linked





D]simple dominant





4.] A child is diagnosed with a rare genetic disease. Neither parent has this disease. The disorder was inherited because it is:





A]dominant and carrier by 1 parent





B]recessive and carried by both parents





C]sex-linked and inherited by the father only





D]the result of a mutation in the child because neither parent has the disease.





You totally rock if you get ALL of these right ;D

Biology help! Please :]?
1. D. Because father passes on Y chromosome to his son and disease is X linked.





2. B. Eye colour in humans is polygenic trait and is determined primarily by the amount and type of pigments in the eye's iris.





3. A. Three alleles Ia, Ib, Io are responsible for blood groups in humans





4.B. Autosomal recessive disease is not expressed in either of parent but may be expressed in child.
Reply:1 d


2 b


3 a


4 b. but cud also be atavism