1. When can you suspect that there may be a genetic interaction between two gene
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Question
1. When can you suspect that there may be a genetic interaction between two genes, each of which shows full dominance between alleles, and when you set up a dihybrid cross between them____?
2. If we cross two heterozygotes for a recessive condition, we expect that 1/4 of the progeny presents the condition. But you set up a cross between heterozygous parents, and 100% of the progeny is phenotypically normal. Which of the following could explain your observation?
3. Consider a blue-flowered plant that crossed to a white-flowered plant gives light blue-flowered progeny... This could be an example of ...
4. In epistasis, the genotype of one locus can "mask" or "hide" the phenotype produced by a different locus. Recessive and dominant epistasis refer to
Explanation / Answer
1. If there is no genetic interaction betwen the genes, the genes would assort independently following Mendel's laws but if there is genetic interaction between the genes, we would see that some of the specific phenotypes occur in more amounts than expected. The ratio would eventually be different thus i.e it would not follow the 9:3:3:1 in the F2 generation as in case of traditional Mendelian ratio thus suggesting that alleles would somehow be linked.
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