GB1 SI Practice Exam 4 12.07.23

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GB1 SI: Practice Exam 4 12/07/2023 Answer the following multiple-choice questions, first without using notes, then double-check your answers with a partner 😊 (you got this!!) 1) Who studied patterns of inheritance in pea plants? a. Lynn Margulis b. Gregor Mendel c. A. Garrod d. None of the above 2) Which of the following is NOT a characteristic of pea plants? a. Self and Cross-fertilizers b. True breeding c. Diploid d. Haploid 3) Who studied alkaptonuria and came up with the “one gene, one enzyme” hypothesis? a. A. Garrod b. G. Beadle c. E. Tatum d. Both B and C 4) For epistasis, what are the chances that the recessive allele will be expressed in the offspring? a. 1/16 b. 3/16 c. 4/16 d. 9/16
5) What is a cross between two individuals who are heterozygous for a single trait? a. Dihybrid cross b. Monohybrid cross c. Test cross d. None of the above 6) Which law states that copies of alleles for a phenotype become segregated or separated into 2 different gametes? a. Law of Segregation b. Law of Independent Assortment c. Mendel’s 2 nd Law d. Central Dogma 7) Ted has a genetic defect that causes him to be sterile, taller than average, willowy, and develop some female secondary sex characteristics. What does his chromosome genotype look like? a. XXX b. XO c. XXY d. XYY 8) Which of the following is NOT a part of the female part of a pea plant? a. Style b. Anther c. Ovary d. Stigma 9) If we have two alleles that are equally dominant for a trait and together appear in the phenotype, which variation is present? a. Incomplete dominance b. Codominance c. Multiple alleles d. Both B and C
10) What types of antibodies are in the serum for O blood? a. Anti-A b. Anti-B c. Both anti-A and anti-B d. Neither anti-A not anti-B 11) Which of the following statements is TRUE concerning A blood? a. Its genotype is AB b. It is codominant with type B blood c. It is codominant with type O blood d. It is dominant to AB blood 12) What is the ability of a gene to affect more than one trait? a. Incomplete dominance b. Codominance c. Epistasis d. Pleiotropy 13) How many autosomes are found in a normal human being? a. 22 b. 23 c. 44 d. 46 14) Which is an example of a sex-linked trait? a. Klinefelter’s Syndrome b. Snapdragons c. Down’s Syndrome d. Hemophilia 15) What is the genotype for the chromosome “X h X”?
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a. Hemizygous b. Homozygous dominant c. Homozygous recessive d. Heterozygous 16) Which of nondisjunction event is NOT an aneuploidy? a. A gain or loss of a part of a chromosome b. A gain or loss of a whole chromosome c. A gain or loss of a whole set of chromosomes d. None of the above 17) What is the chromosome number of someone with Monosomy X? a. 47 b. 46 c. 45 d. 44 18) What genetic defect results in facial deformity and polydactylism? a. Turner’s Syndrome b. Trisomy 18 c. Edward’s Syndrome d. Trisomy 13 19) What is a eukaryotic RNA transcript that has been spliced and processed and is ready for translation? a. tRNA b. Mature mRNA c. Pre-mRNA d. Exon 20) Which of the following molecules is involved in transcription?
a. Nucleus b. Polypeptides c. Ribosomes d. tRNA 21) Which of the following would be found on mRNA? a. 4 H-bonding regions b. Codon c. Anti-codon d. Amino acid attached to the 3’ end 22) How many nucleotides are needed to make a polypeptide with 20 amino acids? a. 26 b. 36 c. 60 d. 66 23) What is the central dogma of biology? a. one gene one enzyme b. DNA tRNA polypeptide c. one gene one nucleic acid d. DNA mRNA polypeptide 24) Transcribe the following DNA strand to mRNA: TACGTATAGAAGCTGTCA
a. AUGCAUAUCUUCGACAGU b. UGACAGCUUAAUCCCAUU c. ATGCATATCTTCGACAGTA d. CTAGCTACCTACTGGATCA 25) Using the codon chart, determine what the amino acid sequence is for the mRNA strand of AUG/AUA/AUC/UUC/GGU/AGU. a. Arg~Ser~Tyr~Cys~Met~Phe b. Met~Asn~Ile~Phe~Trp~Stop c. Met~Ile~Phe~Arg~Leu~Pro d. Phe~Gin~Lys~Ala~Val~Cys
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