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A male mouse that is heterozygous for a mutant igf2 allele (igf2/igf2-) is crossed with a female who is homozygous for the wild-type igf2 allele. what would be the expected outcome of this cross?

Respuesta :

If the wild/normal gene is igf2 and the mutated gene is igf2-, then the genotype of the parent would be: 
male: igf2 / igf2-   ----> possible gametes: igf2  and igf2-
female: igf2 / igf2   ----> possible gamete: igf2

Then the cross result would be: 50% heterozygous for a mutant (igf2/igf2-)  and 50% homozygous for the wild-type(igf2/igf2)

A male mouse that is heterozygous for a mutant igf2 allele (igf2/igf2-) is crossed with a female who is homozygous for the wild-type igf2 allele. The expected outcome of this cross would be fifty percent of homozygous wild type and fifty percent of heterozygous mutant species.

Further Explanation:

The allele that codes the particular phenotype which is most common in a population is called the wild type allele. Mutant allele is referred as different type of allele from wild type. Wild type is dominant in nature. A recessive trait is defined as a trait that gets expressed by an individual when they show a homozygous recessive condition. This means that if an individual showing a recessive trait will definitely possess both the recessive alleles for that trait as recessive trait gets concealed by the presence of allele for dominant trait.

If the wild/normal gene is igf2 and the mutated gene is igf2-, then the genotype of the parent would be:

  • Male: igf2 / igf2, possible gametes: igf2 and igf2-
  • Female: igf2 / igf2, possible gamete: igf2

Then the resultant cross gives fifty percent of heterozygous for a mutant (igf2/igf2-) and fifty percent of homozygous for the wild-type (igf2/igf2).

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Answer Details:

Grade: High School  

Subject: Biology

Topic: Wild and mutant type

Keywords:

Male, female, homozygous, heterozygous, wild, mutant, allele, recessive, dominant, gene, trait, individual, genotype, phenotype, same, genetic makeup, organism.