Chapter 7 DNA Profile

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-LS4-3

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

• True

• False

Tags

NGSS.HS-LS3-1

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:

• physical characteristics

• DNA

• blood group

• skeletal type

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 choices

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

• karyotype

• archetype

• genetics

• All of these choices

The 95 percent of noncoding DNA is involved in:

• blueprint production

• genetic amterial

• cell regulation

• DNA fingerprinting

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

• frequently occurring alleles

• homozygous genotypes