The ratio of offspring produced by a cross between an $F_1$ heterozygote and a recessive parent is ....

How many types of gametes are produced by a plant with the genotype $Rryy$?

Blue eye color is recessive to brown eye color. $A$ brown-eyed man whose mother was blue-eyed marries a blue-eyed woman. What will be the phenotypes of their children?

Using a Punnett square,work out the distribution of phenotypic features in the first filial generation after a cross between a homozygous female and a heterozygous male for a single locus.

In garden pea,round shape of seeds is dominant over wrinkled shape. $A$ pea plant heterozygous for round shape of seed is selfed and $1600$ seeds produced during the cross are subsequently germinated. How many seedlings would have the parental phenotype?

If $3^n$ is the theoretical number of different genotypes (where $n$ is the number of heterozygous gene pairs),then the number of different genotypes produced by a pea plant with the genotype $AaBbCcDdEeFfGg$ is: