I hope everyone feels comfortable with the genetics problems we discussed and worked in class today. We will be adding more types of crosses tomorrow, so go through the chapter and look for examples of:
1) incomplete dominance (such as red and white flowers producing pink)
2) sex linkage (such as hemophilia and colorblindness)
3) codominance (such as human blood types, which is also an example of multiple alleles)
4) epistasis (which is a variation on the dihybrid cross we did in class today; you get a different phenotypic ratio, such as 9:3:4 , 9:7 , or some other ratio)
It is critical that you understand the basic vocabulary: trait, allele, homozygous, heterozygous, genotype, phenotype, hybrid, true-breeding, dominant, recessive, P generation, F1 generation, F2 generation, autosome, sex chromosome. Without this vocabulary, working the problems is pretty much impossible.
We will continue to go through the study guide packet tomorrow and add examples of Punnett squares to your notes.
No comments:
Post a Comment