Question 1

A researcher observes a significant variation in health among individuals in a city and hypothesizes that income may impact health. Which of the following best describes the alternative hypothesis ($$H_a) in $$this scenario?

Accepted Answer

Individuals with higher income will have better health.

Question 2

In the scatterplot showing the relationship between income and metro health index, what does the line of best fit represent?

Accepted Answer

The predicted relationship between income and health index.

Question 3

If hair color in humans is controlled by a single gene with brown hair ($$B) $$dominant to blond hair ($$b$$), what is the expected genotype ratio of offspring from two heterozygous brown-haired parents ($$Bb 	imes Bb$$)?

Accepted Answer

$$1 BB : 2 Bb : 1 bb$$

Question 4

In a cross between a true-breeding yellow-flowered, black-seeded plant ($$FFss) $$and a true-breeding striped-seeded plant ($$SS$$), what is the genotype of the F1 generation?

Accepted Answer

$$FSs$$

Question 5

Which of Mendel’s principles is demonstrated when homologous chromosomes separate during meiosis?

Accepted Answer

Principle of Segregation

Question 6

During meiosis, at which stage do homologous chromosomes line up at the metaphase plate?

Accepted Answer

Metaphase I

Question 7

Which of the following best describes the difference between mitosis and meiosis in terms of chromosome number in the resulting cells?

Accepted Answer

Mitosis produces diploid cells; meiosis produces haploid cells.

Question 8

A diploid cell undergoes meiosis. How many genetically unique haploid cells are produced at the end of meiosis?

Accepted Answer

Four

Question 9

Which of the following correctly describes the structure of a deoxyribonucleotide in DNA?

Accepted Answer

A phosphate group attached to the 5' carbon of deoxyribose, a nitrogenous base attached to the 1' carbon, and a hydroxyl group on the 3' carbon.

Question 10

How are nucleotides connected to each other in a single strand of DNA?

Accepted Answer

By phosphodiester bonds between the 3' hydroxyl and 5' phosphate groups.

Question 11

In the life cycle of a mammal, which process produces haploid gametes from diploid cells?

Accepted Answer

Meiosis

Question 12

Which of the following best explains why the F1 generation from a cross between yellow-flowered, black-seeded ($$FFss) $$and striped-seeded ($$SS) $$plants all have yellow flowers and striped seeds?

Accepted Answer

Yellow and striped are dominant traits.

Question 13

Which of the following is a correct prediction for the null hypothesis ($$H_0) $$regarding the relationship between income and health?

Accepted Answer

There is no correlation between income and health.

Question 14

If a child has blond hair and both parents have brown hair, what must be true about the parents’ genotypes?

Accepted Answer

Both parents are heterozygous ($$Bb).$$

Question 15

Which of the following best describes the connection between the two strands of DNA?

Accepted Answer

Hydrogen bonds between complementary nitrogenous bases.

Question 16

A diploid cell with 8 chromosomes undergoes meiosis. How many chromosomes will each resulting gamete contain?

Accepted Answer

4

Question 17

Which stage in the mammalian life cycle is diploid and results from the fusion of two haploid gametes?

Accepted Answer

Zygote

Question 18

Which of the following is a real-world implication of the positive correlation between income and health observed in the city’s population?

Accepted Answer

Increasing access to health care may improve health outcomes for lower-income individuals.

Question 19

Which of the following best describes the process of DNA replication in terms of nucleotide connection?

Accepted Answer

New nucleotides are added to the 3' end of the growing strand via phosphodiester bonds.

General Biology: Genetics, Cell Division, and DNA Structure Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard