Table of contents

1. Introduction to Biology2h 42m
2. Chemistry3h 37m
3. Water1h 26m
4. Biomolecules2h 23m
5. Cell Components2h 26m
6. The Membrane2h 31m
7. Energy and Metabolism2h 0m
8. Respiration2h 40m
9. Photosynthesis2h 49m
10. Cell Signaling59m
11. Cell Division2h 47m
12. Meiosis2h 0m
13. Mendelian Genetics4h 44m
14. DNA Synthesis2h 27m
15. Gene Expression3h 6m
16. Regulation of Expression3h 31m
17. Viruses37m
- Viruses
  37m
18. Biotechnology2h 58m
19. Genomics17m
- Genomes
  17m
20. Development1h 5m
21. Evolution3h 1m
22. Evolution of Populations3h 53m
23. Speciation1h 37m
24. History of Life on Earth2h 6m
25. Phylogeny2h 31m
26. Prokaryotes4h 59m
27. Protists1h 12m
28. Plants1h 22m
29. Fungi36m
- Fungi
  19m
- Fungi Reproduction
  17m
30. Overview of Animals34m
- Overview of Animals
  34m
31. Invertebrates1h 2m
32. Vertebrates50m
33. Plant Anatomy1h 3m
34. Vascular Plant Transport1h 2m
- Water Potential
  1h 2m
35. Soil37m
- Soil and Nutrients
  20m
- Nitrogen Fixation
  16m
36. Plant Reproduction47m
- Flowers
  33m
- Seeds
  14m
37. Plant Sensation and Response1h 9m
38. Animal Form and Function1h 19m
39. Digestive System1h 10m
- Digestion
  1h 3m
- Blood Sugar Homeostasis
  7m
40. Circulatory System1h 49m
41. Immune System1h 12m
42. Osmoregulation and Excretion50m
- Osmoregulation and Excretion
  50m
43. Endocrine System1h 4m
- Endocrine System
  1h 4m
44. Animal Reproduction1h 2m
- Animal Reproduction
  1h 2m
45. Nervous System1h 55m
- Neurons and Action Potentials
  1h 8m
- Central and Peripheral Nervous System
  46m
46. Sensory Systems46m
- Sensory System
  46m
47. Muscle Systems23m
- Musculoskeletal System
  23m
48. Ecology3h 11m
49. Animal Behavior28m
- Animal Behavior
  28m
50. Population Ecology3h 41m
51. Community Ecology2h 46m
52. Ecosystems2h 36m
53. Conservation Biology24m
- Conservation Biology
  24m

13. Mendelian Genetics

Sex-Linked Inheritance

General Biology

13. Mendelian Genetics

Sex-Linked Inheritance

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Multiple Choice

How are autosomal traits different from sex-linked traits?

Autosomal traits are inherited only from the mother, while sex-linked traits are inherited only from the father.

Autosomal traits are inherited through non-sex chromosomes, while sex-linked traits are inherited through sex chromosomes.

Autosomal traits are always dominant, while sex-linked traits are always recessive.

Autosomal traits are only expressed in males, while sex-linked traits are expressed in both sexes.

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Verified step by step guidance

Understand the basic definitions: Autosomal traits are associated with genes located on autosomes, which are the non-sex chromosomes. Humans have 22 pairs of autosomes. Sex-linked traits are associated with genes located on the sex chromosomes, which are the X and Y chromosomes.

Recognize the inheritance patterns: Autosomal traits can be inherited from either parent and affect both males and females equally because they are not linked to the sex chromosomes. In contrast, sex-linked traits often show different patterns of inheritance in males and females due to the presence of X and Y chromosomes.

Consider the expression of traits: Autosomal traits can be either dominant or recessive, and their expression depends on the combination of alleles inherited from both parents. Sex-linked traits, particularly those linked to the X chromosome, can be more commonly expressed in males because they have only one X chromosome (XY), while females have two (XX).

Evaluate the statement about inheritance: The statement that autosomal traits are inherited only from the mother is incorrect. Autosomal traits are inherited from both parents. Similarly, the statement that sex-linked traits are inherited only from the father is incorrect; they can be inherited from either parent, depending on whether the trait is X-linked or Y-linked.

Clarify misconceptions: Autosomal traits are not always dominant, nor are sex-linked traits always recessive. Both types of traits can be either dominant or recessive, depending on the specific alleles involved. Additionally, autosomal traits are expressed in both sexes, not just males.