In drosophila flies, red eyes (r) are dominant to white eyes (r) and normal wings (w) are dominant to vestigial wings (w). a scientist performs a test cross by mating a rrww fly with an arrow fly to produce the following offspring: what is the percent recombination frequency for this cross?

Incomplete question:

Phenotype----------------------------------Number of offspring

red-eyed, normal wings-------------------368

red-eyed, vestigial wings------------------56

white-eyed, normal wings-----------------40

white-eyed, vestigial wings----------------336

the percent recombination frequency for this cross is 12%

Explanation:

The recombination frequency is equal to:

The maximum recombination is 50%. It is further observed that the number of white eyes and normal wings and the number of red eyes and vestigial wings are less than the number of normal red eyes and white eye vestigial wings. In this way, it is concluded that the species with white eyes and normal wings and red eyes and vestigial wings are the recombinant progenies.

The recombinant frequency is:

%

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.