Question

11/17
what did alfred sturtevant contribute to the field of genetics?
developed the punnett square
mapped genes based on recombination frequencies
proved the theory of evolution
discovered dna

Explanation:

Alfred Sturtevant was a student of Thomas Hunt Morgan. In 1913, he used the recombination frequencies between genes (the percentage of recombinant offspring produced in a cross) to map the relative positions of genes on a chromosome. The idea was that the farther apart two genes are on a chromosome, the higher the probability that a crossover (recombination event) will occur between them. So, by calculating recombination frequencies between multiple genes, he could create a genetic map.

The Punnett square was developed by Reginald Punnett. The theory of evolution was mainly put forward by Charles Darwin (with contributions from Alfred Russel Wallace). DNA was discovered (in terms of being identified as a molecule in cells) by Friedrich Miescher, and its structure was later determined by Watson, Crick, Franklin, and Wilkins.

Answer:

Mapped genes based on recombination frequencies