In peas, the allele for yellow seeds (Y) is dominant to the allele for green seeds (y). What would be the genotype and phenotype ratios of offspring from a cross between Yy (heterozygous) and yy (homozygous recessive) individuals?

The correct answer is explained below:

Explanation:

The allele for yellow seeds is Y.The allele for green seeds is y.The yellow colour phenotype is dominant over the green color phenotype.The genotype of the parent who is heterozygous is : Yy.The gametes produced by the parent who is heterozygous are: Y and y.The genotype of the parent who is homozygous recessive is: yy.The gamete produced by the parent who is homozygous recessive is: y.Crossing the above parents we get the following offspring,

                                           Y                    y

                               y         Yy                  yy

               Phenotype      Yellow          Green

The genotype and the phenotype of the possible offspring is represent in the Punnett square above.The ratio of the genotype is Yy : yy = 1 : 1.The ratio of the phenotype is Yellow : Green = 1 : 1.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.