Ddt is a synthetic compound commonly used as an insecticide. it was used to control mosquito species that commonly spread diseases like malaria. the data show the percent resistance for three species of mosquitoes over three decades. what explains the trend seen in the data? a) genetic drift resulted in the random deaths of non-resistant insects, leaving only resistant mosquitoes to breed. b) artificial selection favored genotypes that were bred by humans to maintain the desired traits in the mosquito populations. c) gene flow between the three species increased the genetic diversity of the populations, resulting in more ddt-resistant species over time. d) natural selection favored resistant members of the species, which survived and reproduced at a greater frequency than non-resistant mosquitoes. el

In a hypothetical breed of dogs, coat color is controlled by two genes. there are six different coat colors in this breed: black, brown, cream, gray, silver, and tan. consider the following crosses. cross 1: black females from a lineage of all black dogs are crossed with brown males from a lineage of all brown dogs. f1 males and females are all black. when f1 are intercrossed, f2 males and females are black or brown. cross 2: black females from a lineage of all black dogs are crossed with tan males from a lineage where all males are tan and all females are cream. f1 males are black, f1 females are gray. when f1 are intercrossed, f2 males and females are black, brown, gray, or tan. cross 3: silver females from a lineage where all females are silver and all males are gray are crossed with brown males from a lineage of all brown dogs. f1 males and females are all gray. when f1 are intercrossed, f2 males are black, brown, gray, or tan, f2 females are cream, gray, silver, or tan. select the correct statements regarding the mode of inheritance of the coat color genes. a) both genes are x-linked. b) both genes are autosomal. c) one of the genes modifies the expression of the other gene. d) each gene has an additive effect on the intensity of coat color. e) each gene independently specifies three colors. f) one of the genes is autosomal, and the other is x-linked.

Which chemical equation is unbalanced? which chemical equation is unbalanced

The arrows indicate the direction of wind flow. which place experiences monsoons?