How can we help?

You can also find more resources in our Help Center.

21 terms

Chapter 12 vocabualry review

STUDY
PLAY
Drosophilia melanogaster
fruit fly
sex chromosome
(genetics) a chromosome that determines the sex of an individual
autosome
any chromosome that is not a sex chromosome
sex linked trait
phenotypic expression of an allele related to the sex chromosome of an indivual
Linkage group
any pair of genes that tend to be transmitted together
map unit
a measure of the distance between two linked genes corresponding to a recombination frequency of one parent
gene mutation
a mutation due to an intramolecular reorganization of a gene
mutation
a change in the dna of an organism
addition mutation
is the addition of one or more nucleotide base pairs into a DNA sequence
insertion mutation
is the addition of one or more nucleotide base pairs into a DNA sequence
deletion mutation
is the removal of one or more nucleotide base pairs from a dna sequence
substitution mutation
is the replacement of one or more nucleotide base pairs in a DNA sequence
frame shift mutation
a mutation that results in the misreading of the code during translation because of a change in the reading frame
Germ cell mutation
a mutation that occurs in sex cells
somatic mutation
a mutation that occurs in a body cell
chromosome mutation
A change in the structure chromosomes or in the number of the chromosomes
chromosome deletion
the loss of a chromosome segment
chromosome inversion
breakage of a chromosome then repair is made with chromosoem in reversed position.
Chromosome translocation
A portion of a chromosomebreaks off and is transferred to another chromosome
chromosome non disjunction
failure of chromosomes to seperate during meiosis resulting in trisomy or monosomy offspring
mutagen
a substance that changes the genetic material of an organism and increases the frequency of mutations