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Chapter 11 Name Date Class 8 What can you conclude about the trait followed in the pedigree below bm A woman who is not colorblind is married to a man who is not colorblind. They have, however, a son who is red-green colorblind. What is the mother’s genotype A X B X B B X B X b C X b X b D X B X A It is incompletely dominant in every other generation. B It is coded for a sex-linked gene. C It affects only females. D The trait shows polygenic inheritance. 9 An individual has type AB blood. His father has type A blood and his mother has type B blood. What is the individual’s phenotype an example of A simple recessive heredity B simple dominant heredity C incomplete dominance D codominance bk Study the blood cells in the picture below. Describe the genotype for the individual with these types of cells. Normal red blood cell A homozygous recessive B heterozygous C homozygous dominant D codominant Sickle cell bl Down syndrome is the result of an extra chromosome 21 in a gamete. What caused this to happen A nondisjunction B telomeres C environment D chromosome inactivation bn Many traits, such as stem length in plants and skin color and height in humans, are controlled by two or more genes. What is this called A simple dominant inheritance B monogenic inheritance C polygenic inheritance D codominance bo A micrograph of matched pairs of human chromosomes can be used to confirm the overall condition of homologous chromosomes in an individual. What is this diagnostic tool called A karyotype B telomere C polygenic trait D twin testing bp Traits controlled by genes on the X chromosome are called sex-linked traits. In what individuals are recessive sex-linked traits more commonly expressed A males because they have a Y chromosome B females because they have two X chromosomes C children who later outgrow conditions brought on by the traits D males because they have only one X chromosome Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. 22 CHAPTER 11 STANDARDIZED TEST PRACTICE
Chapter 12 Name Date Class 1 A molecule of DNA is made up of . A amino acids and proteins B ATP and enzymes C paired nucleotides D receptor enzymes 2 If the structure of DNA were likened to a ladder, what would make up the “supporting structure” (not the “rungs”) of the ladder A amino acids and sugars B nucleotide bases, including thymine C nucleotide bases, including uracil D sugar-phosphate molecules 5 What process is shown in the illustration below A commensalism B deletion C passive transport D replication Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc. Use the illustration below to answer question 3. G C G C A T T A A T C C G 3 The diagram above shows a portion of a DNA molecule. The letters in the diagram represent the four bases: adenine (A), thymine (T), guanine (G), and cytosine (C). Which sequence of bases do the question marks represent A C-A-C B G-C-A C G-A-C D T-C-A 4 Which do DNA and RNA have in common A Both are double stranded. B Both contain ribose molecules. C Both contain phosphate groups. D Both contain uracil. T G 6 Proteins are chains of amino acids bonded together. Which is the correct sequence for making proteins A Information in DNA is formed into protein directly. B Information in RNA uses thermal energy to make protein. C Information in RNA mutates into DNA and then is made into protein. D Information in DNA is transferred into RNA and then made into protein. 7 What occurs during frameshift mutation A Part of the chromosome breaks away, but reattaches normally. B Part of the chromosome breaks away, but reattaches in inverse orientation. C An extra chromosome is added, causing mismatching of the chromosome pairs. D There is a misreading of the base pairs during translation. 8 What causes the two sides of the double helix of DNA to stay joined together A joining of base pairs B joining of phosphate molecules C joining of sugar molecules D joining of RNA molecules STANDARDIZED TEST PRACTICE CHAPTER 12 23
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