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What happens to the myelin around the nerve cells of ALD boys? What causes this change to occur?
buildup of very long chain fatty acids (VLCFAs) in the brain that destroy the protective myelin sheath around nerve cells.
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15
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Who is the "father" of genetics?
Gregor Mendel
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What's the difference between a gene & an allele?
A gene is a portion of DNA that determines a certain trait. An allele is a specific form of a gene.
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15
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Human blood type exhibits which two types of non-Mendelian traits?
Co-dominance or incomplete dominance
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Can a man be a carrier of a non sex-linked trait?
Yes, males can carry non-sex linked traits.
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20
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What is true breeding?
A true-breeding organism is an organism that always passes down certain traits multiple generations in a row.
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thief
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magnet
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rocket
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baam
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20
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What pattern of inheritance does the disease (Lorenzo had) show?
X-linked (Sex-linked) inheritance
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What is a sex-linked gene?
Sex-linked, as related to genetics, refers to characteristics (or traits) that are influenced by genes carried on the sex chromosomes
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heart
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gift
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lifesaver
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What's the difference between dominant and recessive genes?
Dominant genes overrule others. Recessive genes are part of your genes, but not usually expressed if the dominant overrules it.
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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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Can a man be a carrier of a sex-linked gene?
Only females can be carriers; males cannot be heterozygous carriers.
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15
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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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monster
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gift
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rocket
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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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