Biology, 05.02.2020 12:01 Ezekielcassese

Which conclusion about the meaning of y is correct if the allele combination yy is for yellow seeds?
yellow and dominant
green and recessive
yellow and recessive
green and dominant

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Answer from: bige556

The answer is yellow and dominant.

We have two alleles, one dominant and one recessive: Y and y. Usually, a capital letter is used for dominant alleles, so Y is a dominant allele and y is a recessive allele. There are three combinations of those alleles, and thus, three genotypes: YY, Yy, yy.
We know that Yy is for yellow seeds. An individual with Yy is heterozygote. Heterozygotes have one dominant and one recessive allele, but the dominant masks the recessive allele, so expressed trait is dominant. Since yellow seed is the result of heterozygous Yy, yellow seed is the dominant trait.
Therefore, Y means yellow and dominant.

Answer from: Quest

chromosomes carry the genetic information for organisms. also, chromatin is the thread like dna which is located in the nucleus of an organism.

Answer from: Quest

you are certainly talking about this picture:

a: is the label of the white square, it is showing the replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes the dna with the dna template and increases the processivity of the enzyme. ==> stops polymerase from falling off the template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built in the opposite sense of the helicase, so dna will be built in fragments ==> built fragments from 5' to 3 joins

and finally f: is the enzyme that builds the new dna strand (dna polymerase) ==> adds nucleotides to make a new dna helix.

credit: gradman555p98x9p

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Which conclusion about the meaning of y is correct if the allele combination yy is for yellow seeds?...