Option A is correct. After making a punnet square, we can see that the genotypic ratio would be 1:2:1, being 25% dominant, 25% recessive and 50% heterozygous. However, we are asked for the phenotypic trait percentage. The phenotypic ration is 3:1, with 75% polka dotted tail (dominant gene active) and 25% solid tail (recessive gene active).
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Answer:
oceanic plate going down: subduction
theory of crustal structure: plate tectonics
fjord: drowned glaciated valley
isostasy: buoyancy
deepest ocean depths: trench
Answer:
BB and bb
Explanation:
You can solve this by conceptually undoing the punnet square. Each one of the children have a dominant allele (B) and a recessive allele (b). This means that all of them will show the dominant trait. So by that, we know one parent must possess BB and the other one must be bb.
hope this helps :)