Abiologist observes that a species of stick insects on a remote island has three different color traits, almost equally distributed among the population. one phenotype is dark green, a second is light green, and a third is light green with dark green stripes. over a decade, the biologist observes that the dark green phenotype becomes the most abundant, making up nearly 70% of the population. which statement is the best explanation for this phenomenon?

a) none of the color characteristics are undergoing selection at the present time.
b) a founder effect has resulted in an increase in the numbers of the dark green phenotype.
c) the dark green phenotype benefits the insects’ survival, making them more likely to reproduce.
d) the insects with the dark green color trait have developed an r-selection strategy for survival.

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is the most likely effect on the ecosystem? a-an increase in biodiversity. b-an increase in immigration to the area. c-a decrease in available water. d-a decrease in plant growth.

Afamily has a y-linked disease that affects the father. what is the chance of a male offspring inheriting the same disease? oa. 100% ob. 50% oc. 25% d. 0%

Considering the yellow and green pea color phenotypes studied by gregor mendel: a. what is the biochemical function of the protein that is specified by the gene responsible for the pea color phenotype? (1 point) b. a null allele of a gene is an allele that does not specify (or encode) any of the biochemical function that the gene normally provides (in other words, either no protein at all or only non-functional protein is produced from it). of the two alleles, y and y, which is more likely to be a null allele? (1 point) c. in terms of the underlying biochemistry, why is the y allele dominant to the y allele? (2 points) d. why are peas that are yy homozygotes green? (1 point) e. the amount of protein produced from a gene is roughly proportional to the number of functional copies of the gene carried by a cell or individual. what do the phenotypes of yy homozygotes, yy heterozygotes, and yy homozygotes tell us about the amount of sgr enzyme needed to produce a yellow color? explain your reasoning. (2 points)