Which of Mendel’s laws states that organisms inherit two copies of each gene and donate only one copy to each of their offspring?

The change in the genetic composition of a population over time is defined as

When a population splits, becomes reproductively isolated, and accumulates many significant genetic differences, this is defined as

Ellie May, a mother with type B blood, has a child with type O blood. She says that Jethro, who has type A blood, is the father. He says that he cannot possibly be the father. Further, blood tests ordered by the judge reveal that both Ellie May and Jethro are homozygous. The judge rules that

In some cats, black color is due to a sex-linked (X-linked) recessive gene (b); the dominant allele(B) produces orange color.  The heterozygote (Bb) is calico.  What kinds of offspring would be expected from the cross of an orange male and a black female? 

Which of the following is NOT evidence for evolution?

If a child has AB blood type, the parents

All of the following are true about mutations EXCEPT

Linanthus parryae is a small, spring-blooming Mojave Desert annual plant with either blue flowers or white flowers.  The city decided to“remodel” the desert park and bulldozed 90% of the park to redesign and landscape it.  Only a few white flower plants survived the remodeling.  This is an example of

Different species of these birds live on different islands in the Galápagos archipelago, located in the Pacific Ocean off South America. The finches are isolated from one another by the ocean. Over millions of years, each species of finch developed a unique beak that is especially adapted to the kinds of food it eats. Some finches have large, blunt beaks that can crack the hard shells of nuts and seeds. Other finches have long, thin beaks that can probe into cactus flowers without the bird being poked by the cactus spines. Still other finches have medium-size beaks that can catch and grasp insects. Because they are isolated, the birds don’t breed with one another and have therefore developed into unique species with unique characteristics. 

This is an example of

Why is natural selection an important mechanism in evolution?

A genetic disease called Tay Sachs is fatal to all infants within the first five years of life.  This disease is caused by a recessive allele of a single gene.  What is the BEST explanation for why this disease persists even though it is fatal long before the afflicted individual reaches reproductive age?

Which of the following must be true for the prevalence of Tay Sachs in the human population to be in Hardy-Weinberg equilibrium?

The NAT2 gene, is a type of mutation that can increase an individual's chance of developing bladder cancer.   Tobacco smoking is a known risk factor for bladder cancer. According to the American Cancer Society, smokers are at least three times as likely to get bladder cancer as non-smokers. Smokers with one variant in NAT2 have a much higher risk of bladder cancer compared to smokers with a different variant. 

Which of the following statements BEST explain why this is true?

There are at least two genes that control brown hair color, HCL1 on chromosome 19 and HCL3 on chromosome 15. Each of these is very close to the corresponding eye color gene on each chromosome, so that these genes are usually inherited together.

What is the BEST description of the inheritance pattern?

A male chipmunk is moved from one burrow to another burrow after a monsoon storm.  The male begins to make with the female chipmunks in the new burrows.

This is an example of 

Wings in flying animals like bats, birds, and insects, to fins in animals like penguins and fish have similar functions.

This is an example of

Goats were probably the first animals to be domesticated, followed closely by sheep. In Southeast Asia, chickens also were domesticated about 10,000 years ago.

This is an example of which type of genetic change?

Evolution occurs at what hierarchical level?

In snapdragons, heterozygotes have pink flowers, whereas homozygotes have either red or white flowers.  The pink, heterozygous snapdragons are an example of 

The physical appearance, or trait, of an allele is called