Genes $R$ and $Y$ follow independent assortment. If $RRYY$ produces round yellow seeds and $rryy$ produces wrinkled green seeds,what will be the phenotypic ratio of the $F2$ generation?

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?

How many different types of gametes can be produced by the $F_1$ progeny resulting from the cross $AA BB CC \times aa bb cc$?

In the $F_2$ generation of a dihybrid cross,how many types of genotypes are produced?

When $AABB$ and $aabb$ are crossed,in $F_2$ generation the ratio of $AaBb$ will be (in $/16$)

What should be the phenotypic ratio of a test cross between a trihybrid and a homozygous recessive parent?