Answer:
12:3:1
Explanation:
<em>The typical F2 ratio in cases of dominant epistasis is 12:3:1.</em>
<u>The epistasis is a form of gene interaction in which an allele in one locus interacts with and modifies the effects of alleles in another locus</u>. There are different types of epistasis depending on the type of alleles that are interacting. These include:
- Dominant/simple epistasis: Here, a dominant allele on one locus suppresses the expression of both alleles on another locus irrespective of whether they are dominant or recessive. Instead of the Mendelian dihybrid F2 ratio of 9:3:3:1, what is obtained is 12:3:1. Examples of this type of gene interaction are found in seed coat color in barley, skin color in mice, etc.
- Other types of epistasis include <em>recessive epistasis (9:3:4), dominant inhibitory epistasis (13:3), duplicate recessive epistasis (9:7), duplicate dominant epistasis (15:1), and polymeric gene interaction (9:6:1).</em>
B- roots and steams that can store a lot of water
Answer:
A hypertonic solution
Explanation:
There is a greater concentration of solutes outside of the cell than there is inside the cell, therefore it will rush out.
The first statement above is an example of incomplete dominance. If
the calf has black and white spots then that’s an example of codominance.
Incomplete dominance is a form of transitional
inheritance in which one allele for an explicit trait is not entirely expressed
over its paired allele. This effects in a third phenotype in which the
expressed physical trait is a mixture of the phenotypes of both alleles.
Codominance<span> is a form of dominance by which the alleles of a gene
pair in a heterozygote are wholly expressed. This effects in offspring with a
phenotype that is neither dominant or recessive. A usual example showing this type of dominance is
the ABO blood group system.</span>
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