Phenotypically, what two general categories of offspring did sturtevant and morgan observe in the f2 generation of their fly crosses?

Answer;

-Red eyes/ white eyes

Explanation;

-Morgan discovered a single male fly with white eyes. He mated this mutant white-eyed male with a red-eyed (wild-type) female. The F1 generation all had red eyes (wild-type is dominant).

-The F2 generation showed the 3:1 red:white eye ratio, but only males (1/2) had white eyes. Morgan deduced that the white eye mutant allele must be located on the X chromosome.

-Alfred H. Sturtevant, Morgan's student assumed that if crossing over occurs randomly,the probability of crossing over between two genes is directly proportional to the distance between them.

-He used recombination frequencies to assign genes a linear position on a chromosome map and defined one map unit (centimorgan) as1% recombination frequency.

the backbone of the dna and rna compound is sugar phosphate.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products