Genetics and heredity

9.Which of the following are true about chromosomes? (Select all that apply)

10.Match each genetic term with its correct definition.

11.What is the name of the process by which DNA is copied before a cell divides?

12.A mutation in a gene always results in a change in the phenotype of the organism.

13.Which of the following best describes the relationship between genes and DNA?

14.Which of the following are examples of epigenetic inheritance? (Select all that apply)

15.Arrange the following events of protein synthesis in correct order.

16.Which of the following statements about the genetic code are correct? (Select all that apply)

17.In a cross between two heterozygous individuals, the expected phenotypic ratio of dominant to recessive offspring is always 3:1.

18.Arrange the following events in the correct order for the formation of a gamete through meiosis.

19.The diagram below shows a genetic cross for seed shape in pea plants (R = round dominant, r = wrinkled). What is the probability that an offspring will be homozygous dominant?

20.A scientist crosses a plant with red flowers (RR) and a plant with white flowers (rr). The F1 generation all have pink flowers. Which inheritance pattern does this illustrate?

21.In a genetics experiment, a student crosses two heterozygous pea plants (Pp × Pp) for flower colour (P = purple dominant, p = white). They count 200 offspring and observe 148 purple and 52 white flowers. Which statistical test would be most appropriate to determine if the deviation from the expected 3:1 ratio is significant?

22.A student performs a cross between a homozygous dominant tall pea plant (TT) and a homozygous recessive short pea plant (tt). All F1 offspring are tall. The student then crosses two F1 plants. What proportion of the F2 offspring are expected to be homozygous dominant?

23.In a monohybrid cross, the chi-squared test is used to determine if the observed phenotypic ratio significantly differs from the expected ratio.

24.Which of the following are necessary conditions for the Hardy-Weinberg equilibrium to hold in a population? (Select all that apply)

25.Match each genetic term with its correct description.

26.Arrange the following steps in the correct order for a typical monohybrid cross experiment from start to finish.

27.In a dihybrid cross, if the genes are linked (i.e., located on the same chromosome), the phenotypic ratio in the F2 generation is most likely to:

28.What is the name of the molecule that encodes genetic information and is passed from parents to offspring?

29.In a monohybrid cross between two heterozygous parents (Bb × Bb), what is the probability that an offspring will be homozygous dominant?

30.Arrange the following steps in the correct order for the process of meiosis that leads to genetic diversity.

31.Which of the following are true about the relationship between genes and DNA? (Select all that apply)

32.Which of the following statements about the relationship between genotype and phenotype are correct? (Select all that apply)

33.A mutation in a somatic cell can be inherited by offspring.

34.A scientist crosses a plant with red flowers (RR) and a plant with white flowers (rr). The F1 generation all have pink flowers. Which inheritance pattern does this demonstrate?

35.In a test cross, a pea plant showing a dominant phenotype is crossed with a homozygous recessive plant. If half of the offspring show the recessive phenotype, what is the genotype of the dominant parent?

36.Which of the following are necessary conditions for a population to be in Hardy-Weinberg equilibrium? (Select all that apply)

37.In a dihybrid cross between two heterozygous individuals (AaBb × AaBb) where the genes are unlinked, the expected phenotypic ratio in the F2 generation is 9:3:3:1.

38.Arrange the following structures in order from smallest to largest in terms of genetic organization.

39.Which of the following are true about the inheritance of traits? (Select all that apply)

40.Complete the sentence.

41.What is the term for a change in the DNA sequence that can produce new alleles?

42.In a monohybrid cross between two heterozygous individuals (Bb × Bb), what is the probability that an offspring will be homozygous recessive? Give your answer as a decimal.

43.Complete the sentence about inheritance.

44.In a monohybrid cross between two heterozygous pea plants (Tt × Tt) for plant height (T = tall dominant, t = short recessive), how many offspring out of 16 are expected to be short?

45.What term describes a change in the DNA sequence that can produce new alleles?

46.In pea plants, tall (T) is dominant over short (t). A heterozygous tall plant is crossed with a short plant. What is the probability (as a decimal) that an offspring will be short?

47.Complete the sentence:

48.Complete the sentence about chromosomes.

49.Complete the sentence about alleles.

50.In a monohybrid cross between two heterozygous pea plants (Tt × Tt) for plant height (T = tall, t = short), how many offspring out of 16 are expected to be short?

51.A heterozygous tall pea plant (Tt) is crossed with a short pea plant (tt). What is the probability (as a decimal) that an offspring will be tall?

52.Explain why blending inheritance would have been a problem for Darwin's theory of evolution by natural selection.

53.Describe how a mutation in a gene can lead to a change in phenotype.

54.Explain how a test cross can be used to determine the genotype of an organism showing a dominant phenotype. Include the expected outcomes and what they reveal about the genotype.

55.Explain how a test cross can be used to determine the genotype of an organism showing a dominant phenotype. Include the expected outcomes and what they reveal about the organism's genotype.

56.Explain how a test cross can be used to determine the genotype of an organism showing a dominant phenotype. Include the expected outcomes and what they reveal about the unknown genotype.

57.In a monohybrid cross between two heterozygous individuals (Bb × Bb), what is the probability that an offspring will be homozygous recessive?

58.In a monohybrid cross between two heterozygous pea plants (Tt × Tt) for plant height (T = tall dominant, t = short recessive), how many offspring out of 16 are expected to be short?

59.In pea plants, tall (T) is dominant over short (t). A heterozygous tall plant is crossed with a short plant. What is the probability (as a decimal) that an offspring will be short?

60.In a monohybrid cross between two heterozygous pea plants (Tt × Tt) for plant height (T = tall, t = short), how many offspring out of 16 are expected to be short?

61.A heterozygous tall pea plant (Tt) is crossed with a short pea plant (tt). What is the probability (as a decimal) that an offspring will be tall?