The phenotypic ratio obtained in quantitative inheritance of a dihybrid cross is
$1 : 2 : 1$
$1 : 4 : 6 : 4 : 1$
$1 : 6 : 15\ 20 : 15 : 6 : 1$
$9 : 3 : 3 : 1$
Genes that are similar in phenotypic effect when present separately, but together interact to produce a different trait and ratio is $9 : 7$ in $F_2$ generation. What are such genes known as
In erythroblastosis foetalis, which factors of the mother pass through placenta into the foetus
Sex influenced characters are due to
Drosophila melanogastor has $8$ chromosomes in somatic cell. How many linkage groups will be there
Both sickle cell anaemia and Huntington’s chorea are