Chromosomes and Heredity review.doc

Chromosomes and Heredity review.doc - Chromosomes and...

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Chromosomes and Heredity modified from: http://brookings.k12.sd.us/biology/other_units.htm A family record that shows how a trait is inherited over several generations is called a _____________________ A. karyotype B. Punnett square C. pedigree D. periodic table A person that has ONE copy of an AUTOSOMAL RECESSIVE allele and does not express the trait, but can pass it along to his/her offspring is called a __________________. A. mutant B. carrier C. hemophiliac D. gene marker The failure of homologous chromosomes to separate during meiosis is called ____________________ A. segregation B. codominance C. sex-linkage D. nondisjunction This picture of an organism’s chromosomes is called a _________ A. pedigree B. Punnett square C. karyotype The person shown at the left is a __________ because they have two X chromosomes. A. male B. female The chromosomes that DO NOT determine sex are called ____________________ A. sex chromosomes B. autosomes C. gene markers D. pedigree partners Which parent determines the sex of the baby? A. father B. mother The dense region in the nucleus of female cells that forms when one of the X chromosomes is randomly inactivated is called a _____________________ body. A. Turner B. Klinefelter C. Huntington D. Barr 1
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Most sex-linked genes are found on the _______________ A. Y chromosome B. O chromosome C. X chromosome D. #21 chromosome Which of the following genetic disorders results from nondisjunction? A. hemophilia B. PKU C. sickle cell disease D. Turner’s syndrome Which of the following is an AUTOSOMAL DOMINANT genetic disorder? A. Colorblindness B. Huntington’s disease C. Down syndrome D. Tay-Sachs disease Which of the following is an AUTOSOMAL RECESSIVE genetic disorder? A. Colorblindness B. Huntington’s disease C. Tay-Sachs disease D. Down syndrome Heterozygous persons with one sickle cell allele and one normal allele also show resistance to _______________. A. malaria B. yellow fever C. strep throat D. measles Which food group must persons with PKU avoid in order to prevent retardation? A. Carbohydrates B. Fats C. Proteins D. Nucleic acids Which genetic disorder is more common in Caucasians?
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