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2021 - Q25
25 A genetic cross involving two unlinked genes is represented.
AaGG x aaGg
Which genotype is NOT possible in the offspring produced by the cross?
A. AaGG
B. Aagg
C. aaGg
D.
aaGG

Sagot :

marianaegarciaperedo

According to the results of the Punnett square, Option B is NOT a possible genotype in the offspring produced by the cross ⇒ Aagg

Making a Punnett square will help us identity the possible genotypes of the progeny.

What is a Punnett square?

The Punnett square is a graphic representation that shows the different types of gamete combinations according to the alleles involved in a cross.

Punnett square shows the probabilities of getting offspring with different genotypes and their consequent phenotypes.

Cross:

Parentals)         AaGG        x           aaGg

Gametes) AG, AG, aG, aG      aG, aG, ag, ag

Punnett square)   AG         AG         aG        aG

                   aG    AaGG    AaGG     aaGG    aaGG

                   aG    AaGG    AaGG     aaGG    aaGG

                   ag     AaGg    AaGg      aaGg    aaGg

                   ag     AaGg    AaGg      aaGg    aaGg

F1)

Genotype

  • 4/16 individuals are expected to be heter0zyg0us for the A gene and h0m0zyg0us dominant for the G gene, AaGG
  • 4/16 individuals are expected to be h0m0zyg0us recessive for the A gene and h0m0zyg0us fominant for the G gene, aaGG.
  • 4/16 individuals are expected to be heter0zyg0us for the A gene and for the G gene, AaGg.
  • 4/16 individuals are expected to be h0m0zyg0us recessive for the A gene and heter0zyg0us for the G gene, aaGg.

Among the options,

A. AaGG ⇒ Is a possible genotype

B. Aagg ⇒ is NOT a possible genotype

C. aaGg ⇒ Is a possible genotype

D. aaGG ⇒ Is a possible genotype

Option B is NOT a possible genotype in the offspring produced by the cross.

You will learn more about Punnett squares at

https://brainly.com/question/25357981

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