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modern genetics
chapter 26 bio
13
Biology
10th Grade
06/04/2012

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Term
sex chromosomes
Definition
unmatched chromosomes that determine the sex of a child
Term
autosomes
Definition
chromosomes other than the sex chromosomes
Term
sex-linked trait
Definition
trait that is controlled by a gene found on a sex chromosome
Term
linkage groups
Definition
all the genes on the same chromosomes
Term
crossing over
Definition
a process where the homologus break off and exchange genetic information. occurs during anaphase 1
Term
polygenic inheritance
Definition
more than one gene that controls the traits expressed.
Term
gene expression
Definition
each gene directs the synthesis of a particular polypeptide. 3 or more amino acids
Term
exon
Definition
segment of dna that codes for amino acids that will become protein.
Term
intron
Definition
a segment of dna that does not code for amino acids in a protein
Term
enhancer
Definition
controls the access of an enzyme to a promoter
Term
gene expression and temperature
Definition
when the temperature changes the gene is expressed differently
Term
gene expression and development
Definition
homeotic genes that switch other genes on and off by coding for hemotic proteins
Term
oncogenes
Definition
genes that when they get turned on they can cause cancer
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