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Bio Unit 2 Sec 3 #1

Lecture 15Molecular Genetics

QuestionAnswer
____ contains all the info that guides the cell on how it behaves, grows and looks DNA
_______ organisms are DIPLOID, meaning there are ____ copies of each chromosome Eukaryotic; 2
Eukaryotic cells have multiple, ______ chromosomes Linear
A picture of the chromosomes or an organism is the _____ Karyotype
Humans have ___ PAIRS of chromosomes, which means _____ individual chromosomes 23;46
Pairs of chromosomes have the ____ genes Same
Sex chromosomes are represented by ___ and ___ X; Y
_____ have 2 X chromosomes Females
_____ have 1 X and 1 Y chromosomes Males
X chromosomes are ______ and Y chromosomes are _____ Longer; Shorter
Chromosomes that have been stained have a binding or ______ patterns Striped
Chromosomes are DNA and are associated with ______/proteins that ________ and condense CNA Enzymes; Organize
Chromosomes form during cell ______ Division
Nucleotides in a molecule of DNA that code for a particular traits are called _____ Genes
Different versions of genes (ex. gene for eye color can have different versions- blue or brown) are called _____ Alleles
A pair of chromosomes that have the SAME GENES but are not identical copies of each other are _____ chromosomes Homologous
BRCA1 and BRCA 2 genes have been identifies as genes that increase the change of getting _____ cancer because they no longer function right to stop the growth of tissues that can cause _____ Breast; Tumors
DNA and its associated proteins are called: Chromatin
When the cell is ACTIVE, the DNA is LOOSELY organized so the DNA is accessible and can be read is called ______ Euchromatin
When the cell is DIVIDING, the DNA is TIGHTLY packed and organized it is called ____ Heterochromatin
_______ proteins organize DNA initially as the DNA strands wraps around them Histone
These form when DNA wraps around the histone proteins Nucleosomes
After the nucleosomes form, the DNA further coils to condense and form ______ Chromosomes
________ have a nitrogenous basis that have the codes for a _______ Nucleotides; Trait
Created by: scarangelo
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