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Hello! I'm Ms. G, your science teacher, and today we'll be learning about genetics! Here are a few main ideas of genetics. First, I'll be talking about phenotype. Phenotype is the physical traits you see when you look at someone. For example, I have blonde hair and blue eyes
There's also Genotype! Genotypes are the name for the genetic code or combination for a trait. Genotypes are the genetic makeup of an organism.
Next, I'll be talking about homozygous! Homozygous refers to a gene that has identical alleles on both chromosones. It is usually reffered to as XX or xx.
Another thing I'll be explaining is heterozygous! Heterozygous refers to a pair of genes where one is dominant and one is recessive. It is typically referred to as Xx.
But what is dominant and recessive? Dominant is the trait always expressed when present. Recessive is a trait masked by the dominant.
The last thing I'll be talking about is co- dominance! Co-dominance is when both genes are expressed! For example, if you cross a black dog with a white dog, you'll have a black and white dog.
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