- http://www.estrellamountain.edu/faculty/farabee/BIOBK/BioBookgenintro.html
- http://sonic.net/~nbs/projects/anthro201/
- http://anthro.palomar.edu/mendel/mendel_1.htm
Vocabulary
dominant Masks the expression of the recessive trait.
F1 generation The first filial generation; offspring of the P or parental generation.
F2 generation The second filial generation; offspring from the self-pollination of the F1
generation.
gametes Haploid cells involved in sexual reproduction, such egg and sperm.
genetics The study of inheritance.
punnett square Visual representation of a genetic cross that helps predict the expected
ratios in the offspring.
recessive Expression is masked by the dominant factor (allele); only expressed if both
factors are recessive.
Points to Consider
- Do you think all traits follow this simple pattern where one factor controls the trait?
- Can you think of other examples where Mendel’s law does not seem to fit?
6.2 Lesson 6.2: Modern Genetics
Lesson Objectives
- Explain Mendel’s laws with our modern understanding of chromosomes.
- Explain how codominant traits are inherited.
- Distinguish between phenotype and genotype.
- Explain how polygenic traits are inherited.