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?
a. genotype: ½ yy : ½ yy; phenotype: ½ yellow : ½ green
b. genotype: all yy; phenotype: all yellow
c. genotype: ½ yy : ½ yy; phenotype: all yellow
d. genotype: all yy; phenotype: all green

A. Genotype: 1/2 Yy; 1/2 yy. Phenotype: 1/2 Yellow; 1/2 Green.

Explanation: The answer lies in Punnett´s Square. A visual representation of Mendelian inheritance. Dominant genes always express when an organism presents them. Recessive genes express when both alleles contain the recessive gene. A heterozygote contains different alleles for the same gene (Yy). A homozygote contains the same alleles for the same gene (YY/yy), which can be a Dominant (YY) or Recessive (yy) Homozygote.

     y  |  y

Y  Yy | Yy

y   yy | yy

the tricuspid valve is present between right atrium and right ventricle