Recent scientific and public policy discussions have focused on some natural and man-made substances, external to the body, and whether or not these substances interact with the endocrine system. The topic of “endocrine disruptors” is being popularized in media reports and discussed at scientific conferences. Read the following article and […]

Question 1: AABB x AAbb represents a Dihybrid cross. Homozygous condition. Monohybrid cross. Heterozygous condition. Question: 2: What is the condition called when an expressed trait is somewhere between homozygous dominant and homozygous recessive? Heterozygous Incomplete Recessive Incomplete Dominance Incompletely Heterozygous Question3: Which of the following refers to the genetic […]

Q1. What gametes can be formed by an individual organism of genotype RrSs, if the genes are on separate, nonhomologous chromosomes? Q2. What is a polar molecule? Hydrogen bonding? Describe the high surface tension of water. How is this related to the proper function of the pleural serous membranes? Q3. […]

Normal leg size, characteristic of the Kerry type of cattle, is produced by the homozygous genotype dd. Short-legged Dexter type cattle possess the heterozygous genotype Dd. The homozygous genotype DD is lethal, producing grossly deformed stillbirths called “bulldog calves”. The presence of horns in cattle is governed by the recessive […]