Duchenne muscular dystrophy (md) is caused by a recessive allele located on the x chromosome (xd). affected people experience progressive weakening and loss of skeletal muscle. which of the sets of genotypes below would explain how two unaffected people (neither mom or dad have md) could have a child with duchenne md? a. option 1 b. mom is xdxd and dad is xdy c. mom is xdxd and dad is xdy d. mom is xdxd and dad is xdy

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

What element does susan b. anthony include in this passage to strengthen her argument?

Neeed now for 1. eye color is a polygenic trait. what is the possibility of getting a green (aabb) eyed child, if parent 1 has brown eyes (aabb) parent 2 has blue eyes (aabb) 2.albinism is a recessive trait. having normal pigment is the dominant trait. what is the possibility of having an albino child if parent 1 is heterozygous normal parent 2 is heterozygous normal 3.in rabbits black fur is dominant over white fur. what is the probability of getting a rabbit with black fur if parent 1 is heterozygous black parent 2 is homozygous white