It can be challenging to distinguish different forms of genetic inheritance. Con

Question

It can be challenging to distinguish different forms of genetic inheritance. Consider a fish that exhibits different phenotypes in the stripping pattern on its body. The character is controlled by a single gene, with only two alleles, SB and SY.

One parent is homozygous for one of the alleles for this gene, SB, and exhibits a phenotype in which two vertical blue stripes are present. The second parent is homozygous for the other allele for this gene, SY, but they exhibit two yellow vertical stripes.

What is your prediction for the phenotype of the offspring of these fish if the gene is

Explanation / Answer

Ans. Solution to your Question.

Parent = Homozygous SBSB , = 2 Vertical Blue Stripes
Other Parent = Homozygous SYSY , = 2 Vertical Yellow Stripes

Now the nature of Inheritance is Complete Dominant,
Considering SB dominant over SY
Then,
SBSB will give gametes = SB
SYSY will give gametes = SY
So on Cross,
SB X SY = SB SY (2 Vertical Blue Stripes)
Since, SB dominant over SY

Now the nature of Inheritance is InComplete Dominant,
Then,
SBSB will give gametes = SB
SYSY will give gametes = SY
So on Cross,
SB X SY = SB SY (Neither Vertical Blue Stripe Nor Vertical Yellow Stripe)
Since, Incomplete Dominance both the Parent's Traits will not be Displayed.

Now the nature of Inheritance is Co-Dominant,
Then,
SBSB will give gametes = SB
SYSY will give gametes = SY
So on Cross,
SB X SY = SB SY (1 Vertical Blue Stripe and 1 Vertical Yellow Stripe)
Since, Co-Dominant, both the Traits will be Displayed

Now,
Genotypes of Parents
Parent = Homozygous SBSB , = 2 Vertical Blue Stripes
Other Parent = Homozygous SYSY , = 2 Vertical Yellow Stripes

Genotype of Offspring = SB SY

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