Respuesta :

marianaegarciaperedo

Only recessive alleles were involved in the cross. There is only one possible genotype among the progeny, which is pprr. The fraction of the offspring would have the genotype pprr is 16/16 = 1 = 100%.

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.

To answer this question, we will assume independent genes, which means they are not linked in the same chromosome.  

We will use a Punnett square to represent this cross and get the genotypic and phenotypic fractions.

Cross: two individuals that have the same genotype

Parentals)         pprr         x       pprr

Gametes)   pr, pr, pr, pr         pr, pr, pr, pr

Punnett square)

                                 pr      pr      pr      pr

                      pr     pprr   pprr   pprr   pprr

                      pr     pprr   pprr   pprr   pprr

                      pr     pprr   pprr   pprr   pprr

                      pr     pprr   pprr   pprr   pprr

F1)

  • Genotype: 16/16 = 1 = 100% of the progeny is expected to be homozygous recessive for both genes ⇒ pprr
  • Phenotype: 16/16 = 1 = 100% of the progeny is expected to express the recessive phenotype.

In this example, only recessive alleles from independen genes were involved in the cross. There is only one possible genotype among the progeny, which is pprr. No dominant alleles were involved.

You can learn more about Punnett squares at

https://brainly.com/question/25357981

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