If the gametes of an individual are $RY$ and $Ry$ only,then the genotype of the same individual will be . . . . . . .

$A$ trihybrid cross involves three pairs of traits,which gives an $F_1$ hybrid that is heterozygous for three genes. How many types of gametes will be produced in both male and female?

When a pure tall pea plant with green pods is crossed with a dwarf plant with yellow pods, how many $F_2$ offspring out of $16$ will be tall?

When a tall plant with round seeds $(TTRR)$ is crossed with a dwarf plant with wrinkled seeds $(ttrr)$,the $F_1$ generation consists of tall plants with round seeds. How many types of gametes will the $F_1$ generation plant produce?

In humans, brown eyes $(B)$ are dominant over blue $(b)$ and dark hair $(D)$ are dominant over red hair $(d)$. A man with brown eyes and red hair marries a woman with blue eyes and dark hair. They have two children; one resembles the man (brown eyes, red hair), and the other resembles the woman (blue eyes, dark hair). What are the genotypes of the man and the woman?

In pea plants,red flowers $(R)$ are dominant over white flowers $(r)$ and tall plants $(T)$ are dominant over dwarf plants $(t)$. The table below shows the gametes and the possible offspring produced in a dihybrid cross. The numbers $1$ to $16$ represent the genotypes of each individual cross $(e.g., 3 = RrTT)$.

	$RT$	$Rt$	$rT$	$rt$
$RT$	$1$	$2$	$3$	$4$
$Rt$	$5$	$6$	$7$	$8$
$rT$	$9$	$10$	$11$	$12$
$rt$	$13$	$14$	$15$	$16$

If plant $7$ is crossed with plant $12$,then what proportion of the offspring produced will be homozygous for both the recessive characters (in $\%$)?