The structure labeled B is called the

The structure labeled A is called the

The letters A, B, and C when put together are known as what phase?

A DNA segment is changed from AAT-TAG to AAA-TAG. This is a

Consider the following sentence: "The dog did not eat

Which of the following variations of this sentence is most like a base

A cross between a black chicken (BB) and a white chicken (WW) produces all black and white speckled offspring (BW). This type of inheritance is known as…

Hemophilia is a sex-linked genetic disease is expressed by a recessive allele carried on the X chromosome. What is the best explanation on why this disease is more likely to be found in males than females?

A man and a woman have a daughter named Jennifer. Jennifer’s mother is color blind, the father is not. Years later, Jennifer is stopped by the police for driving through a red light. As the police officer is giving her a ticket, she states that she is not at fault because she is color blind.

Which of the following student explanations below best explains the truth?

How many chromosomes are shown in a normal karyotype?

Variation in human skin color is an example of:

Which of the following are shown in a karyotype?

As a cell grows larger, in order to move materials across the cell membrane, and place fewer demands on its DNA, the cell may respond by…

 A biochemist measured the amount of DNA in cells growing in the laboratory

and found that the quantity of DNA doubled. 

Which of the following statements best agrees with this?

Which of the following is a function of mitosis in humans?

Mitosis is the process by which…

During which phase of mitosis do the chromosomes line up along the middle of the dividing cell?

What is the role of the spindle during mitosis?

During mitotic cell division, a parent cell having 4 chromosomes will produce two daughter cells, each containing…

Looking into your microscope, you spot an unusual cell. Instead of the typical rounded shape, the cell has a very narrow middle separating two bulging ends. It sort of looks like the number 8. Then you realize, this is a cell...

 A cell with 24 chromosomes undergoes mitosis twice. How many chromosomes will each daughter cell have?

If a body cell has a diploid number of 24, the gamete would have a haploid number of:

 A cell with a diploid number of 12 chromosomes undergoes meiosis. What will be produced at the end of meiosis?

List the fish from the least to most closely related to the pupfish.

 What would be the expected % of Cytosine content of the cell?

During DNA replication, a complementary strand of DNA is made for each original strand. Thus, if a portion of the original DNA strand is TAC  GAT , then what is the complementary strand of DNA?

Which of the following is the best explanation for why the chromosome number is an even number?

A student was asked to identify the process shown below, and then match it with the correct function. 

Which one of the following best represents the correct answer?

Assume that brown eyes (B) are dominant over tan eyes (b) in guinea pigs. When a brown-eyed male is mated with a tan-eyed female, 50% of the litter has brown eyes and 50% of the litter has tan eyes. What is the genotype of the female guinea pig?

The failure of chromosomes to separate during meiosis is called

Changes in the DNA sequence that affect genetic information are known as

In rabbits, brown (B) fur is dominant to white (b) fur. If a rabbit with the genotype Bb is crossed with a rabbit with a genotype of bb, what percentage of offspring are expected to have brown fur?

The allele for unattached earlobes (E) is dominant to the allele for attached earlobes (e). A woman with the genotype (Ee) and a man with the genotype (ee) have a child. What is the genotype of the first child that exhibits unattached earlobes AND the probability that their second child will have them also?

Line A is a true-breeding line of white-flowered snapdragons. Line B is a true-breeding line of red-flowered snapdragons. A plant from Line A is crossed with a plant from Line B. The resulting F1 offspring are all pink-flowered snapdragons. The F1 offspring fertilize each other. The F2 generation have red, white and pink snapdragon flowers.

What type of interaction between alleles is this?

Line A is a true-breeding line of white-flowered snapdragons. Line B is a true-breeding line of red-flowered snapdragons. A plant from Line A is crossed with a plant from Line B. The resulting F1 offspring are all pink-flowered snapdragons. The F1 offspring fertilize each other. The F2 generation have red, white and pink snapdragon flowers.

What proportion of the F2 would you expect to be white-flowered?

In human blood types, the alleles for Type A and Type B are codominant over the allele for Type O blood. 

If a female with Type O blood and a male with Type AB blood have children, which of the statements is true?

What kind of genetic inheritance is the spotted nose?

What are the genotypes of the individuals (dogs) Lady and Spike?

A pedigree can be used to…

 In the Punnett square shown here, which of the following is true about the offspring resulting from the cross?

Which of the following are found in both DNA and RNA?

The diagram shows a strand of DNA matched to a strand of messenger RNA.

What process does this diagram represent?

Tell the amino acid sequence for the following mRNA message:

MRNA MESSAGE:  A U G    C C A    U G G   

The nucleotide sequence of a DNA codon is ACC. A messenger RNA molecule with a complementary codon is transcribed from the DNA. In the process of protein synthesis, a transfer RNA pairs with the mRNA codon. What is the mRNA sequence AND the corresponding tRNA sequence?

What type(s) of RNA are involved with protein synthesis?

During transcription, an RNA molecule is formed:

Other than the predator-prey relationship that has affected the populations of moose and wolves on Isle Royale, what is another limiting factor that would affect the moose population?

The movement of organisms into an area is called _______________________, while organisms that move out of an area is called _________________________.

A drought has caused the producer populations to significantly decrease. Which statement best describes an immediate effect caused by the decrease of producers?

What is the process by which bacteria convert nitrogen gas in the air into ammonia?

A species of snapping turtles has a tongue that resembles a worm. The tongue is used to attract small fish. Which best describes the interaction between the fish and the snapping turtle?

If the owl is removed from the food web, what will most likely be the result and why?

In the food web below, which of the organisms, X, Y, or Z, is strictly an herbivore?

Organisms that obtain nutrients by breaking down dead and decaying plants and animals are called:

An organism that cannot make its own food is called a (an)

Darwin noticed that many organisms seemed well suited to:

Charles Darwin’s observation that finches of different species on the Galapagos Islands have many similar physical characteristics supports the hypothesis that these finches:

When lions prey on a herd of antelopes, some antelopes are killed and some escape. Which part of Darwin’s concept of natural selection might be used to describe this situation?

In order for a species to survive, it must be able to ______________________________.

In the picture to the right, the giraffe species is shown in their natural habitat. Which of the giraffes would be most likely to survive and reproduce?

Differences among individuals in a species, such as the giraffes, are referred to as:

In a mouse population inhabiting a grassland area, a mutation occurs that results in a new coat color allele. Which of the following factors has the greatest effect on whether the new coat color will become more common in the mouse population?

In North America, the eastern spotted skunk mates in the late winter, and western spotted skunk mates in the late summer. Even though their geographic ranges overlap, the species do not mate with each other. What most likely prevents these two species from interbreeding?

The geographic isolation of two populations of a species tends to increase differences between their gene pools because it __________________________________ and can lead to _________________.

The northern elephant seal (Mirounga angustirostris) was once hunted to near extinction. Only 20 animals remained alive in 1890. After the species was protected from hunting, its population grew to nearly 30,000 animals, but the large population now possesses a very low genetic variation. Which of the following processes is the best interpretation of this scenario?

A student wrote several observations in a field notebook. Which term best classifies all of the student’s observations?

In humans, a male has ____ and _____ chromosomes. He inherits one of them from his mother because female egg cells only produce _____ chromosomes

Which series is arranged in order from largest to smallest in size?

The curled ears of the American Curl cat are caused by an autosomal dominant allele. What are the chances of a heterozygous female and a homozygous recessive male producing an offspring with curled ears?