Chapter 7 DNA Profiling

Because DNA is composed of alternating sugar and phosphate molecules, DNA is known as a double helix.

• true

• false

Most females have one X and one Y (XY) sex chromosome.

• true

• false

To calculate the percentage of people who have a particular allele, population studies are conducted to collect data.

• true

• false

Tags

NGSS.HS-LS3-3

Humans share common ancestors. Therefore the DNA STR profile of all humans is the same.

• true

• false

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-1

mtDNA is used to trace ancestry through the female line.

• true

• false

Except for identical twins, no two people on earth have the same:

• blood group

• skeletal type

• DNA

• physical characteristics

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

People are always shedding cells. Therefore DNA can be recovered from:

• skin cells

• saliva

• semen

• all of these

The term that describes a picture of homologous pairs of human chromosomes is

• karyotype

• genetics

• archetype

• all of these

The 95 percent of noncoding DNA is involved in:

• blueprint production

• genetic material

• DNA fingerprinting

• cell regulation

If one person has two alleles that are the same for a specific STR, then that person is considered to have:

• frequently occurring alleles

• rare occurring alleles

• heterozygous genotypes

• homozygous genotypes