Pedigrees geneticists understand how traits are inherited between generations. red-green color blindness is a sex-linked disorder that is determined by a recessive allele on the x chromosome. if brian has a son who is color-blind, what is known about the genotype of the son's mother? she must have at least one allele for color blindness. she must have two alleles for color blindness. she cannot be homozygous recessive for the gene for color blindness. she cannot be a heterozygous carrier of the gene for color blindness.

This is a coral reef ecosystem. many biotic and abiotic factors affect the health of this ecosystem. which set correctly pairs a biotic factor and an abiotic factor?

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)

Interferons play a vital role in the immune system why are interferons so important?