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16 Cards in this Set
- Front
- Back
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deficiency of phenylalanine hydroxylase
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phenylketonuria
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effect of phenylketonuria
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can't use phenylalanine (essential amino acid) & may become mentally retarded
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sickle cell anemia gene codes for an abnormal form of ?
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hemoglobin (hemoglobin S)
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sickle cell anemia carriers have the sickle-cell trait, meaning half of their hemoglobin is normal (A) and half is abnormal (S). this is because of ?
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incomplete dominance
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when there are more than 2 alleles for a trait, such as in blood type
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multiple-allele inheritance
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genes on the X-chromosome are ?
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sex-linked
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sex linked genes (examples)
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colorblindness
retinitis pigmentosa Duchenne's muscular dystrophy hemophilia |
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phenotype that results from several genes
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polygenic inheritance
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Sry = ?
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sex-determining region of the Y chromosome
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SRY is a ? that can activate genes involved in testis development
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transcription factor
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precursors of female reproductive tract
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Muellerian ducts
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precursors of male reproductive tract
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Wolffian ducts
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XXY
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Klinefelter's syndrome
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XY w/ extra X-chromosomal DNA in band 21 - develop into male/female?
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female
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protein that inactivates SRY
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DSS (dosage-sensitive sex reversal) on X chromosome
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Dax1 encodes the protein ? and is involved in the development of ?
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DSS
ovaries |
