What feature of gymnosperm reproduction makes them more independent of wet surroundings than ferns are?
Explain. Ferns need moisture for reproduction, because the sperm swim to the eggs through a watery film on the surface of the gametophyte. Gymnosperms transmit the male gamete as pollen through the air, which does not require liquid water for fertilization. • (10 pts). You measure the frequency of Rh+ (R) and Rh- (r) alleles among the general population of Rancho Palos Verdes. The frequency of heterozygotes is found to be 0.290. The frequency of R alleles p = 0.775. The frequency of r alleles is found to be q = 0.225. a. Write down the expression from the Hardy-Weinberg equation for the predicted number of heterozygotes in an equilibrium population, and evaluate it. The frequency of heterozygotes is given by 2pq (the frequencies of the two types of homozygotes are given by pxp and qxq). In this case, the frequency of heterozygotes is given by 2pq = 2(0.775)(0.225) = 0.349 Note: Some people wrote down the whole equation, evaluated all three terms, and added them together, thereby provin
