True-breeding tall plants with white flowers are crossed to true-breeding dwarf plants with purple flowers. The F1 plants were tall with purple flowers. The genes that affect these traits independently assort. If the F1 plants were allowed to self-fertilize, the expected ratio of the F2 generation would be

What term applies to the physical and physiological changes experienced by astronauts who spend months in space?  

A cross is made between a green four-o’clock and a white four o’clock. Green chlorophyll synthesis is inherited via the chloroplasts, which are maternally inherited in this species. If the white plant provides the pollen, the expected outcome of the offspring would be

Two genes are 22 map units apart on the same chromosome. A true-breeding GGhh individual is crossed to a true-breeding ggHH individual. The F1 offspring are mated to gghh individuals. If this testcross produces 1000 offspring, how many of them would you expect to be GgHh? 

Which of the following demonstrate bilateral symmetry?

Assuming that 50% of the offspring are male and 50% are female, what is the probability of this couple having a daughter with long index fingers?

Which of the following is not one of the four criteria that the genetic material must fulfill?

A person with trisomy-18 exhibits a collection of physical abnormalities that affect many organs including the brain. These physical abnormalities occur because

Below is a DNA molecule, with the ends labeled A, B, C and D.  Which ends are not extended by telomerase? A  5’———————————————–3’  B C  3’———————————————–5’  D

Which of the following is not one of the four criteria that the genetic material must fulfill to function?