Punnett Squares
Using a Punnet Square scientist find the possible genotype and phenotype of a offspring based on the mother and fathers genes.
Phenotype: The physical traits of an organism
Genotype: The genes of an organism; for a specific gene you use two letters to represent the genotype. A capital letter represents the dominate form of the gene, a lower is the abbreviation for a recessive gene.
Co dominance: A relationship between two genes in where they both are equally expressed
Dominance: When a dominant gene mask over a a recessive gene
Sex Linked: When the X gene is affected in the possible geno/phenotype of the offspring.
Recessive: When the effects of a gene is not masked by a dominant trait, requires two recessive genes.
Genotype: The genes of an organism; for a specific gene you use two letters to represent the genotype. A capital letter represents the dominate form of the gene, a lower is the abbreviation for a recessive gene.
Co dominance: A relationship between two genes in where they both are equally expressed
Dominance: When a dominant gene mask over a a recessive gene
Sex Linked: When the X gene is affected in the possible geno/phenotype of the offspring.
Recessive: When the effects of a gene is not masked by a dominant trait, requires two recessive genes.
Steps:
- Determine the genotypes of the two parent organism (This might already be done)
- Write down the "cross", write the genotypes of the parents
- Draw the Punnett Square
- Split the genotypes letters for the parents and put them on the outside of the square
- Determine the possible genotypes of the offspring
- Share out the information on the chart