In a certain plant, red flowers are dominant over white flowers. A plant heterozygous for red flowers and a plant with white flowers are crossed. Which of the following is the expected proportion of phenotypes in the next generation? o 2 red, 2 white o 4 red, 0 white o 3 red, 1 white o 1 red, 3 white
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.
In a certain plant, red flowers are dominant over white flowers. A plant heterozygous for red flowers and a plant with white flowers are crossed. Which of the following is the expected proportion of
o 2 red, 2 white
o 4 red, 0 white
o 3 red, 1 white
o 1 red, 3 white
When two different variants of a trait exist at the gene level, they are referred to as dominant and recessive traits. The dominant trait is the one that appears first or is most visible in the organism. Recessive traits are those that are present at the gene level but are hidden and do not manifest in the organism.
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