Genes and genome poll Flashcards
The law of independent assortment states that:
a. segregation of an allelic pair for one trait has no effect on segregation of alleles for another trait
b. an organism’s two alleles for a gene separate from one another during gamete formation
c. segregation of an allelic pair for one trait has a great effect on segregation of alleles for another trait
d. an organism’s three alleles for a gene separate from one another during gamete formation
a.
In analyzing the number of different bases in a DNA sample, which result would be consistent with Chargraff’s findinds?
a. A=G; G=T
b. A+G = C+T
c. A+T = G+T
d. A+C = G+C
b.
The behaviour of what cell constituent correlated perfectly with that of Mendel’s genetic factors?
a. The nucleolus
b. The endoplasmic reticuluum
c. The homologous pairs of chromosomes
d. The homologous pairs of centrioles
c.
During cell division, the nuclear material is organized into visible “threads” called
a. chromatids
b. mitochondria
c. chromophores
d. chromosomes
d.
Which of the following structural characteristics is NOT normally observed in a DNA duplex?
a. Purine-pyrimidine pairs
b. External sugar-phosphate backbone
c. Uniform left-handed twists
d. antiparallel strands
e. all of the above
c.
A ____ bond holds the nucleotide subunits in a single DNA strand, while a _____ bond holds the two DNA strands together
a. hydrogen;phosphoryl
b. phosphodiester;hydrogen
c. hydrogen;hydrogen
d. phosphodiester;phosphoryl
b.
Mitotic chromosomes are ____ times more compact than a DNA molecule in its extended form
a. 100,000
b. 10,000
c. 1000
d. 100
b
Which of the following histone proteins does NOT form the octameric histone core?
a. H1
b. H2A
c. H3
d. H4
a.
Which of the following is NOT a chemical group commonly found on core histone N-terminal tails for chromatin regulation?
a. methyl
b. sulfhydryl
c. Phosphoryl
d. Acetyl
b.
