Reproduction and Genetics CHEAT SHEET

Examples:

Vs.

Asexual Reproduction / Sexual Reproduction
Disadvantages
Advantages

SELECTIVE BREEDING- When ______organisms to breed to get desirable traits. Possible because organisms have ______.

______- Father of Genetics – the scientific study of ______. ______- Passing of traits from parent to offspring.

______- Different forms of the same gene

______- Combination of Alleles ______- Physical trait

Heterozygous- ______Ex: ____ Homozygous- ______Ex: ____ or ____

Parents ______X ______Parents ______X ______

1.  For each genotype below, indicate whether it is heterozygous (one dominant allele + on recessive allele) or homozygous recessive (two recessive alleles) or homozygous dominant (two dominant alleles). Heterozygous = H, Homozygous Recessive = HR, Homozygous Dominant = HD

AA ______bb______CC______Dd______Ee ______ff______GG______hh ______

2.  Circle the Genotypes above that would express a Dominant Trait.

3.  For Each of the Genotypes below, determine the phenotypes that would be expressed

4. 

5.  For each Phenotype, give the possible genotype(s)

6. Set up the Punnet square for each of the crosses listed below. Round seeds (R) are dominant to wrinkled seeds (r).

Rr x rr /
/ What percentage of the offspring will be round? ___
What is the phenotypic ratio? ______
What is the genotypic ratio? ______
RR x rr /
/ What percentage of the offspring will be round? ___ What is the phenotypic ratio? ______
What is the genotypic ratio? ______

7. In pea plants purple flowers are dominant to white flowers.

If two white flowered plants are cross, what percentage of their offspring will be white flowered? ______

8. A white flowered plant is crossed with a plant that is heterozygous for the purple trait.

What percentage of the offspring will have purple flowers?______

What percent will have white flowers? ______

9. Show how two purple flowers can cross and have offspring that have offspring with white flowers.

What genotype would both parents need to be? ______and _____

What percent of the offspring would have white flowers? ______