$2$ Multiple Choice $2\mathrm{.}5$ points

Manx cats are tailless and when crossed with one another produce on average $1$ long$-$tailed $($wild type$)$ cat for every $2$ Manx. The M $($Manx$)$ allele is lethal in homozygous

condition due to problems arising during development. Thus, a MM genotype is lethal, a Mm cat is Manx $($tailless$),$ whereas a mm cat is wild type with a long tail. A population

is composed of Manx and wild$-$type cats in a $2$ Manx: $3$ wild$-$type ratio.

The cats randomly mate and reproduce F$1$ progeny. What is the frequency of m allele of the F $1$ generation?

$(1)/(2)$

$(1)/(3)$

$(1)/(4)$

$(1)/(5)$

$(1)/(6)$

l$(2)/(3)$

$(5)/(6)$

$(11)/(12)$

None of these above