In tomatoes, red fruit color is dominant to yellow. round-shaped fruit is dominant to pear-shaped fruit. tall

vine is dominant to short vine





A) if you cross a pure breeding tall plant bearing red, round fruit, with a pure breeding dwarf plant bearing yellow, pear shaped fruit, predict the phenotype of the f1 generation








B)Assuming that the genes controlling the 3 traits are on three different pairs of chromosomes, what are the possible genotypes in the f2 generation





C) what are the expected ratios of the phenotypes?





Can u explain to me the first part of the ? at least.


Thanks in advance; it would be realluy helpful :)

In tomatoes, red fruit color is dominant to yellow. round-shaped fruit is dominant to pear-shaped fruit. tall
1- the phenotype will be red-round tall





explanation:


R=red T=tall P=round r=yellow t=dwarf p=pear shaped





you have this 2 plants:





a) RRTTPP


b) rrttpp





so, when you cross them in a *Punnett* square, you got





RrTtPp, and because all the progeny in the F1 has the same genotype, they are heterozygous, and are red-tall-round.





B) (see the link)


possible genotypes:


RRTTPP


RRTTPp


RRTtPP


RRTtPp


RRTtpp


RRttPP


RRttPp


RRttpp


rrTTPP


rrTTPp


rrTTpp


rrTtPP


rrTtPp


rrTtpp


rrttPP


rrttPp


rrttpp





C- see the link