In the $F_{2}$ generation of a Mendelian dihybrid cross $(TTRR \times ttrr)$,which of the following statements is correct?

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?

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

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

Which genotype characterises an organism that is heterozygous for two genes?

Mark the odd one (w.r.t. $F_{2}$ generation of Mendelian dihybrid cross).