Short hair in rabbits (S) is dominant over long hair (s). The following crosses are carried out, producing the progeny shown.

A. short X short = Progeny ( 3 short and 1 long)

B- short  X long = Progeny  (1 short and 1 long )

What is possible genotypes of the parents of  cross A and cross B respectively

#Question id: 3783

#Section 3: Genetics, Cellular and Molecular Biology

What is the basis for the difference in how the leading and lagging strands of DNA molecules are synthesized?

#Question id: 3784

#Section 3: Genetics, Cellular and Molecular Biology

In analyzing the number of different bases in a DNA sample, which result would be consistent with the base-pairing rules?

#Question id: 3785

#Section 3: Genetics, Cellular and Molecular Biology

The elongation of the leading strand during DNA synthesis

#Question id: 3786

#Section 3: Genetics, Cellular and Molecular Biology

E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA replication). DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment?

#Question id: 3787

#Section 3: Genetics, Cellular and Molecular Biology

A biochemist isolates, purifies, and combines in a test tube a variety of molecules needed for DNA replication. When she adds some DNA to the mixture, replication occurs, but each DNA molecule consists of a normal strand paired with numerous segments of DNA a few hundred nucleotides long. What has she probably left out of the mixture?

#Question id: 3788

#Section 3: Genetics, Cellular and Molecular Biology

The spontaneous loss of amino groups from adenine in DNA results in hypoxanthine, an uncommon base, opposite thymine. What combination of proteins could repair such damage?