Genetics Question PLZ Read Additional info for the question?

Question

In tomatoes, the texture of the skin may be smooth or peach (hairy). The Ponderosa variety has fruits with smooth texture. The red peach variety has fruits with peach texture. Crosses between the two varieties produce all smooth fruits. Crosses between these smooth-fruited F1 plants produce 174 peach textured fruits and 520 smooth textured fruits. How are these skin textures inherited?

Answer 1

Your information on the skin texture of tomatoes shows that it is controlled by a single gene pair. The Ponderosa variety has the Homozygous dominate smooth skin (SS). Red Peach variety is Homozygous recessive (ss) for peachy skin. The cross between the two varieties gives you all Heterozygous (Ss) genotype which would have smooth skin. The cross between the (Ss) f1 generation would be expected to give you a 3 to 1 ratio of smooth skin to peachy skin (1SS 2Ss 1ss). With your data 520 smooth and 174 peach you have an almost perfect 3:1ratio of smooth to peach.

Answer 2

extraordinary.. while it tells you that via crossing Ponderosa and pink Peach style you get all mushy culmination then you definately can infer that the sleek allele is the dominant one. subsequently: ss = pink Peach (furry) SS/Ss = Ponderosa (mushy) attempt the two crosses to examine which one provides all mushy ....S...S s Ss Ss s Ss Ss SS x ss provides a hundred% probability of mushy culmination (considering in basic terms one greater case S implies mushy) ....S...s s Ss ss s Ss ss Ss x ss provides 50% probability of mushy culmination and 50% of furry ones. So now you fairly understand that Ponderosa is SS. then it says that via crossing the F1 you get 174 furry and 520 mushy. it relatively is approximately 25%-seventy 5%. So make the pass between the F1 (first sq.) .....S...s S SS Ss s Ss ss Ss x Ss provides a 25% threat of furry culmination and seventy 5% of mushy. it relatively is through the fact through fact the sleek allele is dominant, that's not had to have a homozygous genotype to recent the function interior the phenotype. meaning.. that's mandatory to have the two decrease case -s- for the fruit to have furry texture. The genotype (genes) must be homozygous (the two the comparable) so as that the phenotype (actual function) supplies the trait. That explains why the F1 is all mushy yet remains waiting to offer furry culmination. that's mushy through fact it has one dominant allele, even though it additionally has the recessive one. desire that helped.. sorry that's see you later..