In snapdragons, red flower color is incompletely dominant to white flower color. Tall is completely dominant to short. You cross a true breeding red-flowered tall plant to a true breeding white-flowered short plant. You cross the F1 offspring to each other. In the F2, what is the probability of offspring that are white-flowered and 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.
In snapdragons, red flower color is incompletely dominant to white flower color. Tall is completely dominant to short. You cross a true breeding red-flowered tall plant to a true breeding white-flowered short plant. You cross the F1 offspring to each other. In the F2, what is the probability of offspring that are white-flowered and tall?
Alleles are two or more variants of a specific gene. Depending on gene expression, alleles can be dominant or recessive. Dominant alleles are those whose expression dominates the recessive allele. Dominant alleles can be expressed in homozygous (both dominant) and heterozygous (one dominant allele and one recessive allele) conditions. Recessive alleles are those that are expressed only if they are present without a dominant allele, i.e., homozygous conditions.
In incomplete dominance, the dominant allele does not fully mask the expression of the recessive alleles. Hence, heterozygotes express an intermediate phenotype (neither dominant nor recessive).
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