Some people have freckles, and some people do not have freckles. If a child has freckles, at least one parent has freckles. However, the child may have a sibling that does not have freckles. Which statement best describes the presence of freckles?
A)Freckles are not determined by DNA.
B)There are two alleles for freckles.
C)There is no dominant allele for freckles.
D)Freckles are determined by two genes instead of by one.
Answers
Answered by
1
Answer:
I think A is right bcoz freckles are caused due to explosion to sunlight☀
Answered by
4
B)There are two alleles for freckles.
Explanation:
- The appearance of freckles over the skin is a dominant trait.
- According to the given situation, one child can have freckle and other cannot this may be because if one of the parent exhibit a heterozygous condition that is one allele is dominant for the expression of the trait and other one is recessive.
- Thus one child will have freckle and other will not.
- In general the freckle is a genetic as well as environmentally acquired trait due to deposition of extra melanin over the skin due to sun exposure.
Learn more about heterozygous condition:
Define homozygous and heterozygous condition: https://brainly.in/question/3815288
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