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You are an amino acid in the lumen of the small intestine. You are looking at transporter proteins protruding from the apical surfaces of intestinal epithelial cells. Your ambition is to be part of one of those membrane transporters.A. beginning from the challenge of entering the cell, until you have […]

Q1. For a diploid species, imagine one set of 100 demes, each with a constant size of 50 individuals, and another set of 100 demes, each with 100 individuals. (a) If in each deme frequencies of neutral alleles A1 and A2 are 0.4 and 0.6 respectively, what fraction of demes […]

A cross ia made in tomatoes between a female plant from a pure line that is trisomic for chromosome 6 and a normal diploid male plant that is homozygous for the recessive allele for potato leaf (pp). a) A trisomic F1 plant (PPp) is back crossed to potato leaved male. […]

Evolutionary biologists have always used a broad range of modern organisms to infer the characteristics that ancestral organisms may have possessed. Genomic sequences are now available for an increasing number of species, and scientists studying evolutionary processes can take advantage of this enormous amount of data to bring evolution into […]