IF THIS IS THE COMPLETE QUESTION WITH MULTIPLE CHOICE.
Two genes interact to produce various phenotypic ratios among F2 progeny of a dihybrid cross. Design a different pathway explaining each of the F2 ratios below, using hypothetical genes R and T and assuming that the dominant allele at each locus catalyzes a different reaction or performs an action leading to pigment production. The recessive allele at each locus is null (loss-of-function). Begin each pathway with a colorless precursor that produces a white or albino phenotype if it is unmodified. The ratios are for F2 progeny produced by crossing wild-type F1 organisms with the genotype RrTt.
9/16 Dark Blue 6/16 light blue 1/16 white
A) At least one copy of each dominant allele results in dark blue, at least one copy of either dominant allele produces light blue, and the absence of both dominant allele produces white.
B) If both dominant alleles are present, the result is dark blue. At least one copy of one specific dominant allele is required for light blue. If that dominant allele is not present, the result is white, regardless of whether the other dominant allele is present.
C) At least one copy of both dominant alleles results in dark blue; at least one copy of one of the dominant alleles also results in dark blue, but at least one copy of the other dominant allele produces light blue; and the absence of either dominant allele produces white.
MY ANSWER IS:
A) At least one copy of each dominant allele results in dark blue, at least one copy of either dominant allele produces light blue, and the absence of both dominant allele produces white.
20 babies were born in the ward, 10 of them had blue eyes and the other 10 had brown eyes.
% of blue eyes babies is 50% and % of brown eyes babies is also 50% (10/20*100).
<h3>What is a Dominant trait? </h3>
Brown eye color gene is a dominant trait, and it can express itself in pure breed condition as well as impure breed condition.
Blue eye color gene is recessive and can only express itself in pure breed recessive condition, the dominant gene repress the expression of the recessive gene phenotypically, but the genetic makeup remains the same.
Hence, the blue-eyed babies have pure breed recessive genotype and brown eyed babies have pure breed dominant genotype or genotype.
Learn more about Dominant and recessive traits
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Answer:
Prevailing winds influence the precipitation by regulating amount of water vapor in air, direction of wind movement and by making cold and hot air masses to move.
Explanation:
Winds make both hot and cold air masses to move. The hot air rises up with wind and cold air rushes to take its place. The hot air coming from water bodies towards the land carry ample of water vapor and causes precipitation in the region. On the other hand, the air coming from land masses does not have enough water vapor to cause any rains in the region.
I believe the only explanation to this is that the tiny organisms and nutrients from deep ocean layer is from dead fishes and other organisms from the deep ocean layer that is how the other fishes get their food supply and nutrients. When a fish dies especially in the deep ocean their bodies float to the top of the ocean.
I believe that is your answer.
Hope this helped :)
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