How Do Scientists Compare People's DNA

question 28

Multiple Choice

How do scientists compare people's DNA?

• A) Because scientists know what genes correspond to what physical traits, they can compare people's DNA by just comparing the traits they see.
• B) Scientists collect the DNA and using an electron microscope, straighten out the strands from different people and compare them by looking at them.
• C) Scientists collect the DNA, chop it up into pieces, and use chromatography to compare them. Different genes show up in different colored bands which can be compared person to person.
• D) Scientists assemble a pedigree for the people they're comparing, and this allows them to compare their DNA.
• E) Scientists collect the DNA, chop it up into pieces, and use electrophoresis to separate the genes according to their electrical charge. The genes show up in bands which can be compared person to person.

Understand the importance of objective and subjective measures in performance evaluation.

Identify biases in performance evaluation and strategies to mitigate them.

Comprehend the significance of performance standards and measures.

Understand the legal aspects and defensibility of performance appraisals.

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Definitions:

Critical Value

A threshold in a statistical test that a test statistic must exceed to reject the null hypothesis.

T-Distribution

A probability distribution that is used to estimate population parameters when the sample size is small and the population variance is unknown.

Population Variances

The measure of dispersion that quantifies how much the values of a population differ from the population mean.

Pooled Estimate

A combined estimate derived from two or more sample estimates, often used in hypothesis testing or meta-analysis.