Mendel studied a tall variety of pea plants with stemsthat are 20 cm long and a dwarf variety with stems thatare only 12 cm long.a. Under blending theory, how long would you expectthe stems of first and second hybrids to be?b. Under Mendelian rules and assuming stem lengthis controlled by a single gene, what would you expectto observe in the second-generation hybrids if all thefirst-generation hybrids were tall?
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
Mendel studied a tall variety of pea plants with stems
that are 20 cm long and a dwarf variety with stems that
are only 12 cm long.
a. Under blending theory, how long would you expect
the stems of first and second hybrids to be?
b. Under Mendelian rules and assuming stem length
is controlled by a single gene, what would you expect
to observe in the second-generation hybrids if all the
first-generation hybrids were tall?
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