A carrier is someone who carries a recessive gene for a trait/disease, but does not express that trait (or have that disease)
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20
What is Mendel's Law of Dominance?
Mendel's law of dominance states that in a heterozygote, one trait will hide the presence of another trait for the same characteristic
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20
What pattern of inheritance does the disease (Lorenzo had) show?
X-linked (Sex-linked) inheritance
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25
What is a polygenic trait? Give an example of a human polygenic trait.
A polygenic trait is a characteristic, such as height or skin color, that is influenced by two or more genes
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15
What is the name of the disease Lorenzo had in the movie?
Lorenzo had Adrenoleukodystrophy (ALD), a genetic disease that progressively destroys the brains of young boys
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15
Who is the "father" of genetics?
Gregor Mendel
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25
What is a testcross?
experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype
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15
Why are Sex-linked recessive disorders more common in males?
Men only have one X chromosome
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20
What are the three different alleles exhibited in human blood type?
There are three different alleles, known as IA, IB, and i.
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15
What's the difference between incomplete dominance and codominance?
In codominance, both alleles in the genotype are seen in the phenotype. In incomplete dominance, a mixture of the alleles in the genotype is seen in phenotype
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15
Human blood type exhibits which two types of non-Mendelian traits?
Co-dominance or incomplete dominance
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15
What is myelin?
Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord