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

Mendel's Experiments

General Biology

13. Mendelian Genetics

Mendel's Experiments

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Multiple Choice

You cross a pea plant with yellow peas (Yy) and a pea plant with green peas. How many unique genotypes are possible for pea color in the offspring? How many unique phenotypes are possible for pea color in the offspring?

2 unique genotypes; 2 unique phenotypes.

3 unique genotypes; 2 unique phenotypes.

2 unique genotypes; 1 unique phenotype.

1 unique genotype; 1 unique phenotype.

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Identify the genotypes of the parent plants. The yellow pea plant has the genotype Yy, where 'Y' is the dominant allele for yellow color and 'y' is the recessive allele for green color. The genotype of the green pea plant is yy, as it must have two recessive alleles to express the green phenotype.

Set up a Punnett square to determine the possible genotypes of the offspring. Place the alleles from one parent (Yy) on the top and the alleles from the other parent (yy) on the side.

Fill in the Punnett square by combining the alleles from each parent. This will give you the possible genotypes of the offspring. The combinations will be Yy and yy.

Count the number of unique genotypes from the Punnett square. In this case, the unique genotypes are Yy and yy, resulting in 2 unique genotypes.

Determine the phenotypes associated with each genotype. Yy will result in yellow peas due to the presence of the dominant 'Y' allele, and yy will result in green peas. Therefore, there are 2 unique phenotypes: yellow and green.

3:02m

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Related Practice

Multiple Choice

If a heterozygous plant is allowed to self-pollinate, what proportion of the offspring will also be heterozygous?

Multiple Choice

Which of the following properties were present in the characters that Mendel examined in his breeding experiments?

Open Question

The smooth feathers on the back of the neck in pigeons can be reversed by a mutation to produce a 'crested' appearance in which feathers form a distinctive spike at the back of the head. A pigeon breeder examined offspring produced by a single pair of non-crested birds and recorded the following: 22 non-crested and 7 crested. She then made a series of crosses using offspring from the first cross. When she crossed two of the crested birds, all 20 of the offspring were crested. When she crossed a non-crested bird with a crested bird, 7 offspring were non-crested and 6 were crested. Which allele is dominant?

Multiple Choice

Mendel crossed a pea plant with yellow peas with a pea plant with green peas. All of the offspring created from this cross has yellow peas. What must be true about the parent plants of this cross for this to occur?

Multiple Choice

In the study of genetics the offspring of the parental generation is referred to as the:

Multiple Choice

The F₁ generation differed from the F₂ in Mendel's experiments in that __________.

Multiple Choice

In Mendel's monohybrid cross of purple-flowered and white-flowered peas, all members of the F₁ generation had the __________ phenotype because their genotype was __________ at the flower-color locus.

Multiple Choice

If a heterozygous plant is allowed to self-pollinate, what proportion of the offspring will also be heterozygous?

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