Albinism is a total lack of skin pigment caused by a recessive gene. What is the probability of a couple having an albino child if a. She is albino, and he is normally pigmented; however, his father was albino.

Aneuron is stimulated with an electric pulse. the action potential is detected at a point 3.70 cm down the axon 0.0052 s later.when the action potential is detected 7.20 cm from the point of stimulation, the time required is 0.0063 s. what is the speed of the electric pulse along the axon? (why are two measurements needed instead of only one? )

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3: 1. if the allele are designated (r & r) receptively. what is the probable genotypes of the round seeds which produced f 1 ? rr & rr rr only rr & rr rr only rr only