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Punnet Squares/Genes
Question | Answer |
---|---|
What does homozygous mean? | A genotype with two of the same alleles |
What does heterozygous mean? | A genotype with two different alleles |
What would happen if someone with HOMOZYGOUS DOMINANT genes crossed someone with HOMOZYGOUS RECESSIVE? (Would the offspring have dominant or recessive genes?) | Dominant |
Name the percentage for each genotype for the offspring of these parents: PP x pp | 100% Pp |
Name the percentage for each genotype for the offspring of these parents: Pp x Pp | 25% pp/ 25% PP/ 50% Pp |
Are the alleles (PP) homozygous or heterozygous? | Homozygous |
Are the alleles (Pp) homozygous or heterozygous? | Heterozygous |
Are the alleles (pp) homozygous or heterozygous? | Homozygous |
If blue eyes are a dominant gene and black eyes are a recessive gene, what is the chance (percentage) of having an offspring with black eyes if the parents have the alleles Pp x Pp? | 75% chance |
Who was the "father of genetics?" | Gregor Mendel |
What plant did the "father of genetics" use to conduct his studies? | Pea Plants |
What is a genotype? | The gene in a person, and the alleles used for that specific gene. (i.e. Bb is a genotype) |
What is a phenotype? | The trait that is decided by the genotype. (i.e. Blonde hair is a phenotype) |
What is the difference between a phenotype and a genotype? | A genotype is the genes. They decide the phenotype, which is the actual trait. |
What are alleles? | Letters used to represent a gene. |
Dominant genes are represented by ___________ letters. | Capital |
Recessive genes are represented by ______________ letters. | Lowercase |
Another word for heterozygous is... ? | hybrid |
Another word for homozygous is... ? | purebred |
Name a homozygous genotype. | (any 2 capital letters) AA, BB, CC, DD... |