About Genetics

Following are some of the multiple choice questions on the Genetics with answers that will help the students in developing their knowledge.

Genetics MCQ

1. When you cross two parents, each parent is responsible for passing _______ of their two alleles for each individual trait.

  • 1
  • 2
  • 3
  • 4

2. The heterozygous DOMINANT trait of dimples?

  • DD
  • dd
  • Dd
  • None of these

3. Who is considered the "father" of modern genetics?

  • Einstein
  • Mendel
  • Disney
  • Washington

4. This is the physical appearance of a trait.

  • genotype
  • phenotype

5. What is the transmission of traits from parent to offspring?

  • heredity
  • genetics
  • cell bio
  • chem

6. Which characteristic did Malek most likely inherit from his parents?

  • his ability to read fast
  • his need to wear glasses
  • his ability to speak English
  • his need to count using his fingers

7. Besides genetics, what other factors are responsible for how you will grow and develop?

  • How people treat you
  • How hard you study
  • Nutrition and environment
  • What your parents look like

8. Who was Gregor Mendel?

  • Father of genetics
  • Father of cells
  • Coined the term heredity
  • No one

9. Y for yellow body is dominant over y for blue body. What alleles would produce yellow bodies?

  • YY,yy
  • Yy,yy
  • YY only
  • YY,Yy

10. In a punnet square where are the parent alleles written?

  • Top and inside the boxes
  • Only on the left and right side of the boxes. 
  • outside of the boxes (top and left side)
  • All on the top side of the boxes

11. Which characteristic could be inherited from a parent?

  • the type of shoes worn
  • having scars
  • the color of hair
  • riding a bicycle

12. The passing of genetic traits from parent to offspring.

  • heredity
  • trait
  • gene
  • allele

13. TT,tt,PP,pp,SS,ss are examples of alleles that are?

  • homozygous
  • heterozygous
  • different
  • homologous 

14. What type of "square" helps us solve genetic problems?

  • carpenter square
  • Mendel square
  • Punnett square
  • genetic square

15. A single cross such as flower color.

  • mono hybrid
  • dihybrid
  • crossing over
  • homozygous

16. W=white hairw= non-white hairIf you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?

  • none
  • 3/4
  • 1/2
  • all

17. Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?

  • 50% tall and 50% short
  • 75%tall and 25% short
  • 100%short
  • None of these

18. An allele whose trait only shows up when no dominant allele is present.

  • hidden allele
  • dominant allele
  • recessive allele
  • present allele

19. The genetic characteristics of recessive genes

  • tend to mask the characteristics of dominant genes.
  • are always expressed in the phenotype.
  • are usually codominant.
  • tend to be masked by the characteristics of dominant genes.

20. How many chromosomes are in a sex cell?

  • 46
  • 23
  • 26
  • 43

21. Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

  • 0 %
  • 25%
  • 50%
  • 75%

22. Characteristic that is inherited; can be either dominant or recessive

  • genes
  • allele
  • chromosome
  • trait

23. Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?

  • height
  • the scar
  • ability to swim
  • ability to play drums

24. When two identical alleles for a trait are in an organism, the organism is said to be ____________?

  • Heterozygous
  • Homozygous
  • allele
  • resseive

25. Having two different genes for a trait (sometimes called hybrid).

  • protein
  • homozygous
  • heterozygous
  • genotype

26. When a capital letter is used, what kind of allele is being represented?

  • Recessive Allele
  • Codominance
  • Punnett Squares
  • Dominant Allele

27. Having two of the same genes for the trait (sometimes called purebred).

  • homozygous
  • hetrozygous
  • protein
  • chromosome

28. The passing of physical characteristics from parent to offspring is __________.

  • genetics
  • heredity
  • genes
  • traits

29. Outward appearance of an organism, regardless of its genes.

  • phenotype
  • genotype
  • haploid
  • deploid

30. The exact genetic makeup of an organism, such as RR, Tt, PP is its?

  • phenotype
  • dominance
  • genotype
  • trait

31. Sex cells are produced through the process of

  • mitosis
  • cytokinesis
  • binary fission
  • meiosis

32. Where, in the eukaryotic cell, is DNA located?

  • ribosomes
  • nucleus
  • E.R.
  • cytoplasm

33. If a mother has the homozygous dominant trait FF, what is her phenotype?

  • Freckles
  • Tall
  • No PTC taste
  • Widow's Peak

34. A mom with a dominant HOMOZYGOUS gene of a hitchhiker's thumb and a dad with a homozygous recessive gene for a straight thumb. What is the baby's phenotype?

  • 50% straight thumb
  • 100% Hitchhiker's Thumb
  • 25% Hitchhiker's Thumb
  • All of above

35. A mom with the heterozygous gene for Widows peak and a father with the heterozygous gene for Widows peak: odds their baby HAS a widow's peak?

  • 0%
  • 25%
  • 75%
  • 100%

36. The homozygous recessive trait for no taste of PTC paper

  • tt
  • Tt
  • TT

37. Genotype or Phenotype: ff

  • Genotype
  • Phenotype

38. Genotype or Phenotype: Black hair

  • Phenotype
  • Genotype

39. Homozygous or Heterozygous: ff

  • Homozygous
  • Heterozygous

40. What does heterozygous mean?

  • An organism that has the same genes for a trait (TT or tt)
  • An organism that has different genes for a trait (Tt)
  • When neither gene is fully dominant; offspring is a mixture of both
  • the different forms of a trait (hair color--> brown, blonde, red

41. Incomplete dominance means that the traits are

  • expressed equally
  • dominant
  • recessive
  • blended

42. Genotype or Phenotype: Freckles

  • Genotype
  • Phenotype

43. A physical characteristic that can be passed from parent to offspring.

  • behavior
  • trait
  • strong muscles
  • ability to fly a plane.

44. If "T" is the allele for tall and "t" is the allele for short, then Tt would produce?

  • tall
  • short
  • medium
  • not enough info

45. Females-XX; MalesXY. A couple has 4 girls. What is the chance the next child will be a boy?

  • 75%
  • 100%
  • 25%
  • 50%

46. "The Great White Shark was 20 feet in length. Phenotype or Genotype?

  • phenotype
  • genotype

47. A recessive allele is represented by a ______ letter.

  • lower-case
  • capital

48. Which of the following genotypes is heterozygous?

  • Bb
  • BB
  • bb
  • B

49. Which of the following genotypes is homozygous dominant?

  • A
  • Aa
  • AA
  • aa

50. The genotypes AA and Aa always show up as the __________ phenotype.

  • dominant
  • recessive

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