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Genotype from Phenotype.
Lab: Determining Genotype from Phenotype.
The class will examine their phenotypes and determine their genotypes. Some of the traits to be
examined are: hair texture, earlobes, hairline, eye distance, tongue rolling
March 14, 2018
Introduction to Punnett Squares.
Explanation shared in class of all the concepts and terminology to understand the expression of genes.
Like all sexual reproducing species, Sponge Bob inherits half his chromosomes with his genes from his mom and half from his dad.
If Sponge Bob is homozygous he would have inherited yellow trait from his mom and yellow from his dad. His genotype would be YY
However, if he is heterozygous, he would have inherited yellow from one parent and blue from another. His genotype would be Yy.
To find out if Sponge Bob is homozygous or heterozygous do a test cross; mate him with a homozygous recessive female of his species.
We know that Sponge Bob's genotype is not yy, because his phenotype would be blue.
The dominant trait overshadows the recessive trait when inherited together.
Create a Punnett square to figure out what would happen in either scenario.
March 13, 2018
Karyotyping Lab:
The class worked on pretend patients to identify chromosomal abnormalities in their DNA.
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