Question

In pea plants, the allele for yellow seeds (Y) is dominant and the allele for green seeds (y) is recessive. Two plants with the following genotypes are crossed:

Yy × Yy

What ratio of yellow seeds to green seeds should you expect in the offspring?


A.
2:2
B.
3:1
C.
4:0
D.
1:3

Answer 1

dominant allele produces a character that is expressed (phenotypically) to the total exclusion of the other allele's character. This means the dominant allele overshadows the recessive allele. Homozygous allele is having the exact same alleles of a particular gene. For instance, having two dominant or having two recessive alleles in a gene.Heterozygous allele is having two different allele of a particular gene. Here, both dominant and recessive alleles are present in the gene.Genotype is the genetic make up of an individual organismPhenotype is the physical characteristics of an individual expressed as a result of genotype. From the above explanation. it can be deduced that1) Homozygous dominant:Genotype: YYPhenotype: The pea plant is yellow because both alleles are expressed for yellow colour in the plant2) Homozygous recessive:Genotype: yyPhenotype: The pea plant is green because both alleles are expressed for green colour in the plant3) Heterozygous:Genotype: YyPhenotype: The pea plant is yellow because the dominant allele here is Y which is the allele expressed for yellow colour

Step-by-step explanation:

Homozygous Dominant: YY- A pure yellow pea podHomozygous Recessive: yy- A pure green pea pod Heterozygous: YyA yellow pea pod.