chapter 7

Chapter 7 - DNA replication b Restriction Enzymes cuts(breaks bonds between nucleotides DNA strands at specific site(sequence into various sized

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Genetic Mutations/ Syndromes XXY: Kilinefelter Syndrome (Male) XYY: Normal Male XXX: Metafemale XO: Turner Syndrome (Female) Sex Determination 1) Amniocentesis: procedure used to collect fetal cells for testing 2) Karyotyping: arrangement of chromosomes by homologous pairs a) Count number of chromosomes b) Check pairs of chromosomes c) Determine sex 3) Sex-linked traits: gene is located on a sex chromosome 1) Pedigree: traces a trait through several generations of a family a) Dominant trait: most likely to appear in every generation; if one parent has the trait, at least 50% offspring are expected to show trait b) Recessive trait: can skip generations; can have parents that don’t show the trait (heterozygotes) while an offspring shows the trait c) Sex-Linked trait: mostly males are “affected”; females are carriers DNA Fingerprinting 1) Purpose: identify individuals (or their relatives) based on DNA patterns 2) Process a) Polymerase Chain Reaction (PCR): increases the amount of DNA for testing (based on
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: DNA replication) b) Restriction Enzymes: cuts (breaks bonds between nucleotides) DNA strands at specific site (sequence) into various sized fragments c) Gel Electrophoresis: process used to separate fragments by size d) DNA Fingerprint: the pattern of bands in the gel 1 Gene Expression 1) Gene: a specific sequence of nucleotides that codes for a protein 2) Ribonucleic Acid (RNA) a) Made up of nucleotides (monomer) b) RNA vs. DNA i) RNA has Uracil which replaces Thymine and bonds with Adenine c) Three types of RNA i) mRNA (messenger): complementary copy of a DNA gene ii) rRNA (ribosomal): RNA used to make a ribosome iii) tRNA (transfer): carries amino acids to the ribosome 3) Transcription a) Use the gene as a template to build a complementary copy of the information (mRNA) b) Occurs in the nucleus c) RNA polymerase (lines up complementary nucleotides) recognizes the beginning of the gene 2...
View Full Document

This note was uploaded on 07/07/2008 for the course BIOL 115 taught by Professor Behrens during the Spring '07 term at Towson.

Page1 / 2

Chapter 7 - DNA replication b Restriction Enzymes cuts(breaks bonds between nucleotides DNA strands at specific site(sequence into various sized

This preview shows document pages 1 - 2. Sign up to view the full document.

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