iversity- BIOL 406- Spring18- NIKONOROVA> Activities and Due Dates Ch 5 Animatio
ID: 188523 • Letter: I
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iversity- BIOL 406- Spring18- NIKONOROVA> Activities and Due Dates Ch 5 Animation Activity-Epista 2/5/2018 08:00 AM 4 35/100 Print Calculator-Penodic Table estion 3 of 5 Genetics: A Conceptual Approach Reading Quiz Pierce 6th Edition MHE/Freeman presented by Sapling Leaming Use the information gathered in the Epistasis Animation to answer the following question. Although both dominance and epistasis involve masking of gene expression, they are different from each other. What is the major difference? Dominance is very common in gene expression whereas epistasis is a very rare phenomenon. Dominance involves a gene that dominates whereas epistasis involves a gene that represses its own expression. Dominance involves one allele masking another at the same locus whereas epistasis involves one locus masking a different locus Dominance involves masking of one phenotype by another whereas epistasis involves masking of both phenotypesExplanation / Answer
1) Option 3. Dominance is defined as supression of expression of phenotype of one allele of a gene by the other allele(same loci). Epistasis is the supression of effect of one gene by another gene (different loci).
2) Option 1. As E gene only controls deposition of pigment and without a functioning B gene it's action is irrelevant. Therefore gene E is hypostatic.
3) Option 3. Dominant epistasis phenotypic ratio is 9:3:4
4) Option 3. Incomplete Dominance. It causes partial expression of one gene over another thus resulting in intermediate color Gray.
5) Option 5. As both phenotypes antigens M&N are being expressed, it is a situation of codominance.
6) creeper genotype: CrCR (2n) heterozygous as homozygous condition is lethal.
CRCr × CRCr --- CRCR(normal) CRCr(creeper) CrCR(creeper) CrCr(death)
Therefore, 2 creepers : 1 normal
7) Option 2.
8) Option 4. No of genotypes = sum of integers between 1 to no of alleles. Here, no of allele = 3; no of genotype = 1+2+3 = 6.
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