According to Mendelian genetics, what phenotypic outcome do you expect in the progeny when you cross a heterozygote (Aa) with a homozygous dominant individual (AA)?
75% will have the dominant phenotype, 25% will have the recessive phenotype
25% will have the dominant phenotype, 75% will have the recessive phenotype
50% will have the dominant phenotype, 50% will have the recessive phenotype
All with have the dominant phenotype
50% will have the dominant phenotype, 50% will have the recessive phenotype.
According to Mendelian genetics, when you cross a heterozygote (Aa) with a homozygous dominant individual (AA), you would expect that 100% of the progeny will have the dominant phenotype.
According to Mendelian genetics, the phenotypic outcome of a cross between a heterozygote (Aa) and a homozygous dominant individual (AA) can be determined by understanding the principles of dominant and recessive alleles.
To solve this, you need to know the genotypes and phenotypes involved in the cross. In this case, the heterozygote (Aa) has one dominant allele (A) and one recessive allele (a), while the homozygous dominant individual (AA) has two dominant alleles (A).
The dominant allele (A) determines the dominant phenotype, and the recessive allele (a) determines the recessive phenotype.
Now, let's consider the possible genotypic combinations that can be produced when crossing a heterozygote (Aa) with a homozygous dominant individual (AA):
- The heterozygote (Aa) can produce two types of gametes: one carrying the dominant allele (A) and one carrying the recessive allele (a).
- The homozygous dominant individual (AA) can only produce gametes carrying the dominant allele (A).
These gametes can combine in different ways to produce offspring with varying genotypes and phenotypes. When we cross a heterozygote (Aa) with a homozygous dominant individual (AA), the possible offspring genotypes are:
- AA (homozygous dominant)
- Aa (heterozygous)
To determine the phenotypic outcomes, we need to consider the dominance of the alleles:
- The dominant allele (A) determines the dominant phenotype.
- The recessive allele (a) determines the recessive phenotype.
From the possible genotypes listed above, we can see that all the offspring will have at least one dominant allele (A). Therefore, the phenotypic outcome will result in all offspring having the dominant phenotype.
So, the correct answer is:
All the offspring will have the dominant phenotype