exam prep Flashcards
nucleic acids are polymers of___
nucleotides
during which type of cellular division does crossing over occur?
only during meiosis
if a double stranded, helical DNA molecule is analogous to a twisted rope ladder with handrails and steps, then the two steps are representative of…
nitrogenous bases connected via hydrogen bonds
is the G1 phase a part of mitosis?
no silly goose
during which part of mitosis does the nuclear envelope break down?
late prophase
the members of a pair of chromosomes are called…
homolegous chromosomes
during which phase of mitosis do sister chromatids seperate and move to the opposite poles of the cell?
anaphase
in a certain plant species, thick-shelled seeds are caused by the dominant allele T, while thin shelled seeds are caused by the recessive allele t. consider an individual plant that has thin shelled seeds, what is the genotype of this individual?
tt
cycstic fibrosis is caused by the allele c, which is completely recessive to the normal dominant allele C. consider a couple with the genotype CC. what is the chance their first child will develop CF
25%
in pea plants, the allele for purple flower (P) is dominant to the allele (p) for white flowers. in a cross between a purple flowered plant and a white flowered plant, all 73 of the offspring plants had purpled flowers. which descirbes the cross above?
PP x pp
a double stranded dna molecule that has 22% guanine will have…
28% thymine and 22% cytosine
rna differes from dna in that rna…
is single stranded
the sequence of events in the process of protein synthesis is usually :
DNA to RNA to protein
the term semiconservative replication refers to the fact that:
the newly created dna molecule includes a parental strand and a newly created complimentary DNA strand
what is the result of crossing over during meiosis I?
chromosomes with new combinations of alleles are created
what is the sequence of how an animal is built?
meiosis - fertilization - zygote - embryo
a cell plate forms during what process?
cytokenisis in a plant cell
homologous chromosomes seperate during:
meiosis I
what is the end result of meiosis?
four haploid cells are produced
during which cellular division does the reduction of chromosome numbers occur?
meiosis I
