In a certain plant, the genes for flower color and pollen shape are linked. In fe color, Purple (P) is dominant to red (p), and long pollen (L) is dominant to round (1). A researcher crossed true-breeding purple, long pollen plants with true-breeding red, round pollen plants. The Fl generation was then testcrossed with a double homozygous recessive individual. The resultant offspring were as follows. PpLI 44 ppLI 6 Ppll 8 ppll 42 a. What are the phenotypes of the recombinant-type offspring? b. How far apart are these genes in centiMorgans (cM)? c. What are the genotypes of the parental-type GAMETES?
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, the genes for flower color and pollen shape are linked. In fe color, Purple (P) is dominant to red (p), and long pollen (L) is dominant to round (1). A researcher crossed true-breeding purple, long pollen plants with true-breeding red, round pollen plants. The Fl generation was then testcrossed with a double homozygous recessive individual.
The resultant offspring were as follows.
PpLI 44
ppLI 6
Ppll 8
ppll 42
a. What are the
b. How far apart are these genes in centiMorgans (cM)?
c. What are the genotypes of the parental-type GAMETES?
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