Explain the Dihybrid cross worksheets from yesterday.
April 5, 2018
Class assignment: Dihybrid cross- Two different worksheets ( Individual work)
April 4, 2018
Pages 496 - 515 from the BSCS Biology Book, ( The textbook checked out to you), will cover the topics covered in class since the start of Genetics.
Sex linked / X-linked traits explained.
Sex-linked / X-linked disorders affecting mainly males was also explained.
Examples of a few sex-linked conditions are: hemophilia, red-green color blindness, congenital deafness, Duchenne muscular dystrophy, and some forms of mental retardation.
Click on the image below to enlarge.
April 3, 2018
April 2, 2018
Introduction to Gregor Mendel; The Father of Genetics
Introduction to dihybrid cross
In addition to his studying of single gene, Mendel also studied the phenotypic expression and segregation of two genes. This highlights his Law of Independent Assortment.
A dihybrid cross is a cross between two true-breeding parents that differ at two alleles.
For example: Peas that yellow and smooth crossed with peas that are green and wrinkled.
Let's make green and smooth the dominant trait.
Parental generation genotype:
ggSS x GGss
F1 Generation (First Filial Generation)
The phenotype : all green and Smooth
The genotype : GgSs
F2 Generation ( Second Filial Generation)
Results: 4 Different phenotypes.
Use the information explained in class and practice finding the phenotypes and genotypes of the F2 generation.
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