Exam 21: Population Genetics and Evolution at the Population, Species, and Molecular Levels

If the frequencies of two alleles in a population are 0.1 and 0.2, what is the chance that an individual randomly chosen from this population is heterozygous for these two alleles?

Testing to determine if someone is heterozygous for a recessive allele is called_________ .

Pharmacogenetic screening aims to reveal what kind of trait?

The 'two- hit' hypothesis suggests that _________.

CODIS markers are analyzed ___________ .

Inspecting a fetus by ultrasound can reveal which of the following?

A testing outcome in which a disease is detected, but the sample/patient in reality does not have the disease is called a _________.

First- degree relatives share 50% of their alleles, second- degree relatives share 25% of their alleles, and third- degree relatives share 12.5% of their alleles. Which of the following are third degree relatives?

The selection for different alleles affecting the expression of the LCT gene in milk- drinking human populations is an example of?

A family with only one affected parent and a child with a dominant disease would like to know what the probability is that one of their unaffected children might be a carrier. What do you tell them?

Genetic screening to assess disease risk among individuals in a subpopulation is called _________.

What is the statistical principle underlying genetic health risk assessment is called?

The most common cause of cancer formation is _________ .

To help the Abuelas de Plaza de Mayo (Grandmothers of May Square) Mary- Claire King analyzed__________to identify illegally adopted children? A) mitochondrial DNA B) DNA from hair C) DNA from the Y- chromosome D) CODIS markers E) paternity testing

All of the following are hallmarks of cancer except _________ .

The ability to travel rapidly over the Earth is expected to have what effect on human populations?

A pregnant woman with recessive X- linked hemophilia and whose partner is a normal (non hemophiliac) man wants to know the chances that she will have an affected child. From an ultrasound, she knows that the child is a boy. What are the chances that her son will have hemophilia?

Applying the exclusion principle to forensic genetics allows investigators to__________ . A) exclude any suspects with at least one allele that matches a crime scene B) include all suspects until guilt is established C) include all suspects with at least one allele that matches a crime scene D) exclude any samples not found at the crime scene E) exclude any suspects whose DNA does not contain an allele that was detected at the crime scene

Pedigrees are useful for _______ .

The Paternity Index (PI) is calculated by dividing ___________by_________ .