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

Which one of the following crosses will have a $1:1:1:1$ ratio of progeny?

Which traits did Mendel consider for his dihybrid cross experiment?

In a cross between $TTRr$ and $ttrr$,what percentage of the offspring will be tall with red flowers (in $\%$)? (Assume $T$ is tall,$t$ is dwarf,$R$ is red,and $r$ is white).

The dihybrid test cross ratio of $1: 1: 1: 1$ proves that

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?