Assuming complete dominance, a phenotypic ratio of is expected from a monohybrid sib or self-cross. a) 1: 1 b) 2: 1 c) 3: 1 d) 5: 2 e) 3: 2

C (3:1)

Explanation:

Gregor Mendel was able to portray complete dominance of an allele over another when he crossed two purebreeding plants; one homozygous for red flowers and the other for white flowers. He discovered that all the F1 offsprings were red-flowered. Hence, he came up with his law of dominance.

He self-crossed the F1 offsprings which were all hybrids or heterozygous i.e. contained a combined allele in their genotype. He discovered that the offsprings produced a phenotypic ratio of 3:1 i.e 3 red-flowered plants to 1 white-flowered plant

The red-flowered plants have genotypes RR, Rr and Rr respectively while the white-flowered plant have a rr genotype.

when it is at an intermediate population density

flooding wildfire landslides climate change the factors listed have an immediate effect on the animal populations found in any habitat. the four factors would lead to a death. b emigration. eliminate c immigration. d mutations.