If a plant that is heterozygous for all theses characters is crossed with a plant homozygous dominant for seed shape and seed color and heterozygous for pod shape,
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.
Character | ||
Seed Shape | Round (R) | Wrinkled (r) |
Seed Color | Yellow (Y) | Green (y) |
Pod Shape | Inflated (I) | Constricted (i) |
If a plant that is heterozygous for all theses characters is crossed with a plant homozygous dominant for seed shape and seed color and heterozygous for pod shape, what proportion of the offspring would you expect to be as follows:
1. Homozygous dominant for the three characters. (Answer in fraction) ____
2. Recessive for the three characters. (Answer in fraction) _________
3. Heterozygous dominant for the three characters. Answer in fraction) _______
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