In human beings,multiple genes are involved in the inheritance of

$A$ polygenic trait is controlled by $3$ genes $A, B$,and $C$. In a cross $AaBbCc \times AaBbCc$,the phenotypic ratio of the offspring is observed as $1:6:x:20:x:6:1$. What is the possible value of $x$?

The phenotype of one parent for skin colour is $AABBCC$ and the other parent is $aabbcc$. What will be the skin colour and genotype for their progeny?

In a polygenic trait,an individual with three recessive alleles expresses $50 \%$ of the trait,while an individual with three dominant alleles expresses $80 \%$ of the trait. What is the contribution of each dominant allele to the trait (in $\%$)?

Human skin color is determined by polygenic inheritance. How many types of phenotypes will be produced by the cross $AaBbCc \times AaBbCc$?

In human beings,the colour of skin is controlled by