This document provides definitions for key genetics and heredity terms. It includes explanations of concepts like alleles, genetics, dominant and recessive traits, Punnett squares, genotypes and phenotypes. Example terms defined are heredity, hybrid, incomplete dominance, polygenic inheritance, blood types, sex-linked genes, and Mendel's contributions to the study of heredity through experimentation with pea plants.

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4. The passing of
traits from parent
to offspring

5. Heredity

6. Different forms of
a trait that a gene
may have

7. Alleles

8. The study of how
traits are inherited
through the
interactions of
alleles

9. genetics

10. Mendel was the
first to do this.

11. First to trace one
trait through several
generations or use
probability to
explain heredity

12. Receive different
genetic information,
or different alleles
for a trait from each
parent.

13. hybrid

14. Covers up another
trait

15. dominant

16. The form of a trait
that seems to
disappear

17. recessive

18. A tool used to
predict results in
genetics

19. Punnett Square

20. The genetic
makeup of an
organism

21. genotype

22. The way an
organism looks and
behaves

23. phenotype

24. An organism with
two alleles that are
the same

25. homozygous

26. An organism that
always produces
the same traits
generation after
generation

27. purebred

28. An organism that
has two different
alleles for a trait

29. heterozygous

30. When the offspring of
two homozygous
parents show an
intermediate
phenotype

31. incomplete
dominance

32. A trait controlled
by more than two
alleles

33. multiple alleles

34. Occurs when a
group of gene pairs
acts together to
produce a trait

35. polygenic
inheritance

36. The number of
alleles that controls
blood type

37. three

38. Traits that are
controlled by
polygenic
inheritance

39. eye color, hair
color, height, skin
color

40. An allele inherited
on a sex
chromosome

41. sex-linked gene

42. Determines the sex of
a child?

43. the male

44. Visual tool for
following a trait
through
generations of a
family

45. a pedigree chart

46. What determines
the inheritance of
cystic fibrosis?

47. recessive genes

48. The reason
Mendel’s
predictions were so
accurate

49. He worked with
large numbers of
plants

50. In this, both alleles
are expressed in
offspring

51. incomplete
dominance

52. An example of
multiple alleles

53. blood type

54. How is it possible for
two parents with
blood types A and B
have a child with
blood type O?

55. O is recessive,
parents could be
carriers

56. Physical
appearance
resulting from
genotype

57. phenotype

58. Colorblindness is
an example of this

59. sex-linked disorder

60. A capital letter
stands for this

61. dominant trait

62. The chance that an
event will take place

63. probability

64. Make your wager

65. The three principles
of heredity

66. Traits are controlled by
alleles, alleles effect is
dominant or recessive,
different alleles for a trait
move into separate sex
cells during meiosis