During a dihybrid cross with contrasting characters,in the $F_2$ generation,what is the proportion of individuals with parental genotypes (in $/6$)?

$A$ heterozygous trihybrid plant produces .....

In rabbits,black skin $(B)$ is dominant over brown skin $(b)$ and short hair $(S)$ is dominant over long hair $(s)$. $A$ homozygous black,short-haired male is crossed with a homozygous brown,long-haired female. All $F_1$ offspring are heterozygous black,short-haired. If the $F_1$ male is crossed with an $F_1$ female,what is the percentage of homozygous black,short-haired offspring in the $F_2$ generation (in $\%$)?

$A$ plant with the genotype $AABbCcDD$ is self-pollinated. Assuming independent assortment of the four genes,what will be the proportion of the $AAbbccDD$ genotype in the progeny?

How many different types of gametes will be formed by a pea plant with genotype $TtYy$?

If gene $A$ is dominant for height (tall) and gene $B$ is dominant for white color,what proportion of the $F_1$ progeny from the cross $AABb \times aabb$ will be short and white (in $\%$)?