Assignment:
1. Define genetics and heredity.
2. What was Gregor Mendel's contribution to Science?
3. What were the advantages of using the pea plant for Genetic research?
4. What were the 7 traits that Mendel selected for further study?
5. Mendel's experiments had three features that represented improvements over previous experiments involving genetic crosses. What were they?
6. Explain the technique that Mendel used to perform a monohybrid genetic cross using the flower of a pea plant that had yellow seeds with the flower of a pea plant that had green seeds. What were the offspring from such a cross called?
7. Explain the terms dominant and recessive.
8. Explain the terms phenotype and genotype.
9. Define the terms gene, allele.
10. Define the terms homozygous, heterozygous.
11. State Mendel's Law of Segregation.
12. Perform a genetic cross of pea plants with purple flowers with pea plants with white flowers. Use W for the purple trait, and w for the white trait. Show the results for the F1 and F2 generation.
13. What is the phenotypic ratio for this cross? The genotypic ratio?
14. What is a test cross?
15. Perform a test cross of pea plants with purple flowers with pea plants with white flowers. Use W for the purple trait, and w for the white trait.
Using the example of a cross ofpea plants with purple flowers with pea plants with white flowers, let's assume the parent chosen from the F2 generation of plants with the yellow-seeded phenotype was homozygous (WW). The test cross would be:
All of the individuals resulting from the cross of an individual homozygous for purpleflowers with an individual that is homozygous recessive (white-flowered) will appear ____________________. The parent with the unknown genotype was ________.
Now consider the cross in which a heterozygous individual is chosen by chance and used for the cross:
In this case there are two ____________________ individuals and two____________________ individuals, a ratio of 1 ____________________ to 1 ____________________. The parent with the unknown genotype was ________.
16. What is a dihybrid cross?
17. State the Principle of Independent Assortment.
18. Perform a dihybrid cross using the following example. In guinea pigs, the allele for black fur B is dominant over the allele for brown fur b. The allele for short hair S is dominant for the allele for long hair s.
What is the phenotypic ratio from this cross?
19. What is incomplete dominance?
20. Define the term mutation. Compare chromosomal mutations to point mutations. Define gene deletion, duplication, inversion, and translocation.
Attachment:- Patterns of inheritance.rar