Milk secretion and beard growth, both the traits are

Polytene chromosomes in salivary glands of are formed as a result of

Sometimes the separation of twins is incomplete and these are borne attached are remain so even after. Such twins are known as

In pea plants, red flowers $(R)$ are dominant over to white flowers $(r)$ and tall plants $(T)$ are dominant over to dwarf plants $(t)$. The table below shows the gametes and the possible offsprings produced in a dihybrid cross. The numbers $1$ to $16$ represent the genotypes of each individual cross $(e.g. 3 = RrTT)$

                $RT$      $Rt$     $rT$      $rt$

$RT$             $1$        $2$       $3$       $4$

$Rt$              $5$        $6$       $7$       $8$

$rT$              $9$        $10$     $11$     $12$

$rt$               $13$       $14$     $15$    $16$

If plant $7$ is crossed with plant $12$, then what proportion of the offsprings produced will be homozygous for both the recessive characters

The gene which increases the frequency of mutation in other gene is referred to as

The grafting between two identical twins is known as