Question

In peas, yellow seed color (Y) is dominant to green seed color (y). Which describes an organism that has nonidentical alleles for seed color?

Answer 1

Answer:

The genotype of a particular trait in an organism can be classified into two types based on the presence of identical and non-identical alleles of that trait:

Homozygous condition: This term is used when an organism contains identical alleles of a particular trait. They can be further classified into homozygous dominant (contains identical dominant alleles such as YY) and homozygous recessive (contains identical recessive alleles such as yy).

Heterozygous condition: It is used to describe an organism which contains non-identical alleles for a particular trait. Organism contains one dominant and one recessive allele in its genotype for example, Yy in this case.

The phenotype of the trait is determined by dominant allele. For example, the phenotype of Yy in this case would be yellow seed color as Y is a dominant allele.

Answer 2

Yy and has yellow seeds describe an organism that has nonidentical alleles for seed color.

Alleles and dominance

An allele is a gene variant for a given locus, diploid organisms inherit two alleles for a given gene locus.

• An individual is heterozygous when it receives two different alleles for a given locus.

• In complete dominance, the dominant allele completely masks the expression of the recessive allele in heterozygous individuals.  

In conclusion, Yy and has yellow seeds describe an organism that has nonidentical alleles for seed color.

Learn more about alleles here:

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