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DiKsa [7]
3 years ago
14

Speed is the ratio of the distance of an object moves to

Biology
1 answer:
galina1969 [7]3 years ago
6 0

It is the ratio of distance an object moves to the amount of time needed to travel the distance. Option b.

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The genes for sex-linked traits are carried on either the X or Y chromosome. Duchenne muscular dystrophy (DMD) is a recessive, s
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There is a 50% probability that the child will be a boy. If this is the case, he will inherit the X chromosome from his mother and the Y chromosome from his father. Since the woman has DMD, the boy will certainly inherit the disease, since he only has one X chromosome and it carries the disease. We know that both of the mother's X chromosomes carry the disease because since it is recessive, both of her chromosomes must have it in order for her to have it. 

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If the child is a girl, there is a 0% chance that she will have the disease (although she will be a carrier). 

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The answer is D)
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