Summarize and give examples of the relationship between heritability and correlation coefficients and explain how
each is calculated.What will be an ideal response?
ANSWER: Heritability is calculated by using relatives because we know the fraction of genes shared by
related individuals. These relationships are expressed as a correlation coefficient or the
fraction of genes shared by two relatives. A child receives half of his or her genes from each
parent. The half set of genes received by a child from its parent corresponds to a correlation
coefficient of 0.5. The genetic relatedness of identical twins is 100%, and the correlation
coefficient therefore is 1.0. Unless a mother and a father are related by descent, they should
be genetically unrelated, and the correlation coefficient is 0.0. Using the genetic relatedness
among population members expressed as a correlation coefficient and using the measured
phenotypic variation expressed in quantitative units, a heritability value can be calculated for
a specific phenotype in a population. If the heritability value for a trait is 0.72, this means that
72% of the phenotypic variability seen in the population is caused by genetic differences in
the population
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The pairing of homologous chromosomes is called
A. syngamy. B. synapsis. C. alignment. D. independent assortment. E. crossing over.
Provide a brief definition for positive interference
What will be an ideal response?
In this scenario, what is the most likely procedure beer makers use to produce alcohol from starchy grains?
A) Water is used to break the bonds between glucose subunits in the starch, in a form of dehydration synthesis. B) The starch is converted into glycogen, which is easier for the yeast to digest. C) The starch is converted into a polymer of many glucose molecules before being used. D) The starch is broken down into mono- and/or disaccharides by hydrolysis before use.
Epistasis often involves genes of an enzymatic pathway.
Answer the following statement true (T) or false (F)