С. What are the expected genotypic ratio, and phenotypic ratio of green to red if: i. the Fi's are intercrossed? i. the F1's are crossed with red plants?
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 an autotetraploid Chinese primrose (Primula sinensis L.), the gene controlling stigma color is very near the centromere of the chromosome carrying it. The allele G for green stigma is dominant to g for red stigmas. A homozygous green autotetraploid strain is crossed with a homozygous red autotetraploid strain. Show all solutions and label solutions and final answers properly.
a. What is the genotype of the F1?
b. Derive the types of gametes the F1’s may be expected to form and the proportion of each.
c. What are the expected genotypic ratio, and
i. the F1’s are intercrossed?
ii. the F1’s are crossed with red plants?
d. If the G locus were 50 or more map units from the centromere, what types and proportions of
gametes would the F1 be expected to produce? Derive the expected F2 genotypic and phenotypic ratios
Answer letter C only. please, thank you!
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In an autotetraploid Chinese primrose (Primula sinensis L.), the gene controlling stigma color is very near the centromere of the chromosome carrying it. The allele G for green stigma is dominant to g for red stigmas. A homozygous green autotetraploid strain is crossed with a homozygous red autotetraploid strain. Show all solutions and label solutions and final answers properly.
a. What is the genotype of the F1?
b. Derive the types of gametes the F1’s may be expected to form and the proportion of each.
c. What are the expected genotypic ratio, and
i. the F1’s are intercrossed?
ii. the F1’s are crossed with red plants?
d. If the G locus were 50 or more map units from the centromere, what types and proportions of
gametes would the F1 be expected to produce? Derive the expected F2 genotypic and phenotypic ratios
Answer letter D only. please, thank you!
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