Sea otters reproduce sexually and have 38 chromosomes per diploid cell. How many

Question

Sea otters reproduce sexually and have 38 chromosomes per diploid cell. How many of a sea otter's chromosomes are genetically identical to chromosomes possessed by its mother?

Question options:

it could be any number between 0 and 19 due to independent assortment

it could be any number between 0 and 19 due to crossing over

it could be any number between 0 and 38 due to random fertilization

exactly 19

exactly 38

it could be any number between 0 and 19 due to independent assortment

it could be any number between 0 and 19 due to crossing over

it could be any number between 0 and 38 due to random fertilization

exactly 19

exactly 38

Explanation / Answer

Answer: D. exactly 19

Because, each individual might be inherited half of the chromosomes from mother and the remaining half from father.

The Sea otter has 38 chromosomes and half is 19. So 19 chromosomes of a sea otter are genetically identical to chromosomes possessed by its mother

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