WorksheetsDNA Profiling and Genetics
Total questions: 20
Worksheet time: 15mins
Because DNA is composed of alternating sugar and phosphate molecules, DNA is known as a double helix.
True
False
mtDNA is used to trace ancestry through the female line.
True
False
Except for identical twins, no two people on earth have the same:
physical characteristics.
DNA.
skeletal type.
blood group.
The term that describes a picture of homologous pairs of human chromosomes is:
karyotype.
genetics.
archetype.
All of these choices.
If one person has two alleles that are the same for a specific STR, then that person is considered to have:
rare occurring alleles.
heterozygous genotypes.
homozygous genotypes.
frequently occurring alleles.
Which chromosomes have the same shape and contain the same genes?
genes.
autosomes.
(XX).
introns.
(GAAT) (GAAT) (GAAT) (GAAT) is an example of:
restriction fragments.
PCR.
DNA fingerprinting.
STR.
Ninety-five percent of DNA is non-coding. What term describes non-coding DNA that acts as genetic "on-an-off" switches?
base pairs
exons
introns
karotypes
ATG TGA CAG
How many chromosomes do human cells have?
46
23
2
44
If there is only one allele (one peak) on the electropherogram for a particular locus, what does that tell you about the genotype?
the genotype is heterozygous
the genotype is codominant
the genotype is homozygous
the person did not inherit any allesl for that STR loci
How many STR regions are analyzed for CODIS in the U.S.?
2
10
15
13
Most females have one X and one Y (XY) sex chromosome.
True
False
