DNA Profiling

A population of 150 individuals has an allele frequency of 0.3 for the dominant allele (B) and a frequency of 0.7 for the recessive allele (b). Use the Hardy-Weinberg equation to determine the frequency of the genotype (bb).

• 0.09
• 0.42
• 0.49
• 0.21

Tags

NGSS.HS-LS4-3

If guanine makes up 19% of the nucleotides in a sample of DNA from an organism, then cytosine would make up _____ percent of the bases.

• 19%

• 62%

• 31%

What can be determined about the DNA in bands I and II?

• Band I contains a longer DNA sequence than band II.

• The DNA bands have the same DNA sequence

• The DNA bands are the same size

• Band II contains a longer DNA sequence than band I.

Tags

NGSS.HS-LS3-2

What material is used to isolate and cut DNA into fragments?

• restriction enzymes

• polymerase chain reaction (PCR)

• electrophoresis

• short tandem repeat (STR)

Why do the fragments of DNA in gel electrophoresis travel away from the negative electrode?

• DNA is negatively charged so attracted to the positive end of the unit
• DNA is positively charged to attracted to the negative end of the unit
• the agarose gel in negatively charged
• the agarose gel is positively charged

What can DNA fingerprinting determine in forensic investigations?

• The identity of the perpetrator

• The motive behind the crime

• The location of the crime scene

• The time of the crime

What is the significance of short tandem repeats (STRs) in DNA fingerprinting?

• They provide unique identifiers for individuals

• They determine the presence of genetic diseases

• They control gene expression

• They are responsible for protein synthesis