In ursa gummi, the famed gummy bear soldiers, a quality that is sought is bravery (dominant phenotype). the recessive phenotype is timidity or conformity. the alleles and genotypes corresponding to these phenotypes at two loci are presented below. a_ codes for brave; aa codes for timid/conforming; b_ codes for brave; bb codes for timid/conforming. what is the phenotypic ratio of brave: timid offspring from a cross between two doubly heterozygous ursa gummi, if the mode of inheritance is duplicate recessive epistasis?

Phenotype- 100% for the recessive trait (aa, bb)

Explanation:

This happens because of the mode of inheritance, which would mask the dominant trait, during a cross. Therefore, this would lead to all offspring not expressing the dominant phenotype

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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c. movement because i took the test and it lets me review my answers