Answer to Question #160714 in Organic Chemistry for Nawid Sayed

Question

In tomatoes, red fruit is dominant to yellow fruit and hairy stems are dominant to hairless (smooth) stems. The two genes controlling these traits are inherited in normal Mendelian fashion and are not linked.

a)   Produce a suitable key for this information in terms of the individual alleles of the genes given.                                                                                   

b)   What are the possible genotypes of plants showing the following forms:    

                                                                                                            

i)            Red fruit and smooth stems :   

ii)           Yellow fruit and hairy stems :     

Red fruit and hairy stems           

c)   On crossing a plant with red fruit and hairy stem, with one that was yellow fruit and hairy stem, the following progeny were obtained:

           30 red, hairy / 11 red, smooth / 29 yellow, hairy / 9 yellow, smooth

Give a reasoned explanation along with the use of full genetic diagrams to proof your answer, to explain these results in terms of the simultaneous transmission of characteristics.

Answer 1

An individual's genotype for that gene is the set of alleles it happens to possess. ... two copies of each chromosome, two alleles make up the individual's genotype. ... (Note that with the advent of neutral genetic markers, the term 'allele' is now ... An allele is a viable DNA (deoxyribonucleic acid) coding that occupies a given