Exam 1 key - NAME: BIO325Genetics...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
NAME:  1 BIO325 Genetics Exam 1-Key Instructor: Dr. Tracey Ruhlman TA: Teofil Nakov MULTIPLE CHOICE 1 POINT EACH: Please choose only one response, WRITE YOUR LETTER RESPONSE AT THE LEFT BELOW THE QUESTION NUMBER. 1. An allele of a gene is best described as: a) A highly related gene found at a different locus b) The regulatory regions of a gene c) A variation in the nucleotide sequence of a given gene that may or may not result in a detectable phenotype d) A variation in the nucleotide sequence of a given gene that is always associated with a detectable phenotype e) All of the above 2. In the diploid cells of an organism, there can be _________ different allele(s) of a given single-copy nuclear gene. a) Only one b) One or two c) One, two, three, or four d) Many 3. In a population, there can be _________ allele(s) of a given single- copy nuclear gene. a) Only one b) One or two c) One, two, three, or four d) Many 4. Which of the following chemical characteristics of DNA forms the basis for hybridization technologies to detect specific DNA sequences? a) Antibodies that recognize DNA bind tightly to it, forming highly specific probes. b) Antigen-antibody complexes react specifically with DNA and form the basis for Western blotting. c) Single-stranded DNA will bind tightly to a sequence identical to it. d) Single-stranded DNA will bind tightly to a sequence complementary to it. e) No two DNA sequences are exactly identical.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
NAME:  2 5. When referring to two homologous chromosomes in an individual diploid cell, it is most correct to state: a) These chromosomes will normally carry the same genes, in the same order . b) These chromosomes will normally be identical in sequence. c) These chromosomes will normally carry the same genes, but often not in the same order. d) All of the above e) DNA is replicated: a) Prior to both meiosis I and meiosis II b) During the S phase portion of interphase c) Prior to meiosis I but not prior to meiosis II d) A and b e) B and c 6. If a gene is haploinsufficient, you would predict: a) Heterozygous diploids bearing a null mutant allele and a wild-type copy of the gene will be viable, but haploids bearing a null mutant allele will be nonviable. b) A null mutant allele will behave in a dominant fashion. c) The species of organism is always diploid, never haploid. d) A null mutant allele will behave in a gain-of-function fashion. e) A null mutant allele will behave in a recessive fashion. 7. An individual displays a dominant phenotype. To determine whether the individual is homozygous for the dominant allele or heterozygous at that locus, you would best do a: a) Complementation test b) Epistasis test c) Genome sequencing analysis d) Testcross e) None of the above 8. If two nuclear genes in a diploid eukaryote are physically linked by DNA sequence data, but we have no additional data other than this, we can say with confidence that they: a) Are homologs b) Are genetically linked and would cosegregate during meiosis c) Are separated by no more than 1 cM d) Are located on the same chromosome e) Are located on separate chromosomes
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/17/2009 for the course BIO Genetics taught by Professor Saxena during the Spring '08 term at University of Texas at Austin.

Page1 / 16

Exam 1 key - NAME: BIO325Genetics...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online