Afemale cat has two recessive genes for long fur (ss) and a male cat has two dominant genes for short (ss). what is the likelihood the two cats produce a kitten with short fur a. 25% b. 50% c. 75% d. 100%

D. 100%

Explanation:

You have two cats. The male has a dominant (SS) gene for short hairs, while the female has resessive genes (ss) for short hairs and has long hairs. As we know, the resessive genes are only expressed in the presence of other recessive genes. As the kitten of these two cats will receive an allele from each other it is impossible for the kitten to have long hair (ss), because when given an allele from each parent, this kitten will be heterozygous (Ss) and as the dominant gene is expressed in heterozygosis , the kitten has a 100% chance of owning short hair.

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.

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