catalyse the corresponding reactions indicated above. The recessive alleles a, b, c and d are non-functional and do not produce active enzymes. The dominant E allele totally inhibits the action of gene C, while the recessive allele e has no effect. a) Determine the F1 and F2 phenotypes from a cross between AAbbCCDDEE and AABBCCDDee plants. b) What proportion of the offspring of an AaBBCCDdEe x AaBBCcDdEe cross is expected to have coloured flowers?
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.
Genes A, B, C, D, and E are independently assorting. The dominant alleles A, B, C and D encode enzymes that catalyse the corresponding reactions indicated above. The recessive alleles a, b, c and d are non-functional and do not produce active enzymes. The dominant E allele totally inhibits the action of gene C, while the recessive allele e has no effect.
a) Determine the F1 and F2
b) What proportion of the offspring of an AaBBCCDdEe x AaBBCcDdEe cross is expected to have coloured flowers?
Step by step
Solved in 2 steps
