Question

If you were to cross a rare blue-shelled lobster with the more common red-shelled and the offspring had red bodies and tails and blue legs and claws, what can you conclude about the genetics of lobster coloration?

a) the alleles for lobster coloration show codominance

b) the alleles for lobster coloration show incomplete dominance

c) the gene for lobster coloration is polymorphic

d) lobster coloration is the result of two genes interacting

e) the gene for lobster coloration has pleiotropic effects

Answer 1

Answer : a) The alleles for lobster coloration shows Codominance.

Explanation :

Codominance -

• Both alleles express themselves equally in F1 heterozygote.
• There is no mixing of effect of both alleles.
• F1 resembles both parents.
• Here alleles express themselves independently when present together.

Incomplete dominance -

• There is mixing effect of both alleles to form a new phenotype in offspring.
• F1 did not resemble either of two parents and was in between two
• Example : Red flower is crossed with white flower , offspring has pink coloured flower ( new phenotype)

Pleiotropy -

• When single gene control several phenotype.
• Example : In Drosophila,white eye mutation leads to depigmentation in many parts of body.

Hope you like my answer???? Please rate my answer✒️✒️??Thank you very much.