Without genetic variation, some of the basic mechanisms of evolutionary change cannot operate. Consider the three primary source
s of genetic variation.
1. mutations
2. gene flow
3. sexual reproduction
Review the diagram involving meiosis and fertilization. In all three scenarios, other than the principles governing meiosis, what is the source of genetic variation?
A)mutation
B) gene flow
C) nondisjunction
D) random assortment
1. mutations
2. gene flow
3. sexual reproduction
Review the diagram involving meiosis and fertilization. In all three scenarios, other than the principles governing meiosis, what is the source of genetic variation?
A)mutation
B) gene flow
C) nondisjunction
D) random assortment
1 answer:
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I hope this helps, good luck!
Answer:
In humans, blood group is determined by three alleles ,
, and
.
and
are co-dominant whereas
is recessive to other two.
Thus, if a person with blood group O produces offspring with blood group B then the other parent must contain allele.
The genotype of other person can be ,
, or
.
There is only one condition in which the person can have offspring with blood group O that is, when the other parent is .
In this condition, the probability of an offspring to have blood group O is 50%.
In other conditions, the probability of an offspring to have blood O is 0%.
