BIO 207 CHAPTER 2 REVIEW.docx

2 Pages
80 Views
Unlock Document

Department
Biology (Biological Sciences)
Course
BIOL107
Professor
Lesley Harrington
Semester
Fall

Description
Chromosome: containers of genetic information; a complex made of DNA+ proteins Core histones: protein molecules that act as spools around which DNAis coiled twice Nucleosome: bead on a string structure along with DNAis wound Histone H1: compacts DNAstrand and its nucleosome 30nm fiber: resulting shape of DNA scaffold proteins: wind 30 nm DNAinto coils chromatin: material that makes up chromsomes; euchromatin: loosely packed, contain many genes to be transcribed heterochromatin: densely packed, high-repetitive sequences satellite DNA: short, highly-repetitive sequences centromere: heterochromtic proteins that appear as chromosomal constrictions metacentric: middle acrocentric: on one end telocentric: nea the edges; highly repetitive sequences holocentric: no single centromere is central telomere: repetitive sequences that offer protections and from cell getting too small homologous chromosomes: similar but non-identical chromosomes non-°©‐homologous  different gene loci, may or may not be same alleles sister chromatids  same genetic material non-°©‐sister chromatids  two separate homologous chromosomes; contain same genes in the same order, not necessaeily identical DNAsequences DNApolymerase  builds DNAvia replication Telomerase  telomere DNA, RNA-directed DNApoly Mitosis  asexual cell division Prophase --. condense Metaphase  chromo in the middle Anaphase  chromosomes move to opposite poles Telophase  daughter cell makes identical sets Cytokinesis --. Cytoplasmic cell division Meiosis  sexual reproduction Syanaptonemal  proteins bind homologous chromosomes together along their length complex bivalent --. TWO PIECES TOGETHER crossovers reductional division  dividing the number of chromosomes from 2n to 1n equational division  number of chromosomes per cell is unchanged, G 1phase  gap 1, normal single chromosome growth phase G 2phase  before mitosis, not found in meiosis cells S phase  chromosome replication M phase  mitosis/ meiosis phase G 0 --. Permanent, non-dividing stage called Go phase Interphase  all parts of cell cycle excluding cell meiosis/ mitosis C  dna content of cell N  represents number of chromosomes Haploid --. 1n are haploid, gametes (1n) replicated chromosome  sister chromatids are duplicated but are still counte
More Less

Related notes for BIOL107

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit