In snapdragons the cross BB tt YY times bb TT yy is made and

In snapdragons, the cross BB tt YY times bb TT yy is made and the three genes are found robe linked as follows in the F1 progeny: If the F1 progeny above is test crossed, what proportion of the progeny is expected to be bb tt yy? Assume no interference. 0% 0.48% 1/16 0.24% 0.96%

Solution

A cross between BBttYY and bbTTyy would give BbTtYy progeny in F1 generation. According to the given map, T/t and Y/y genes are present close together on the chromosomes and would therefore show linkage. So, it is not possible to have genetic combination of \"ttyy\" in F2 generation due to absence of crossing over between these genes in F1 progeny. So, correct answer is A (0%).