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Biology Quizlet #10

13 Terms quater 2

QuestionAnswer
Epigenetics the study of environmental influences on gene expression that occur without a DNA change
Mutation random change in a DNA sequence that affects genetic information
Point Mutation gene mutation in which a single base pair in DNA has been changed with a different base
Frameshift Mutation mutation that involves the insertion or deletion of a nucleotide in the DNA sequence
Mutagen chemical or physical agents in the environment that interact with DNA and may cause a mutation
Melanin a dark brown to black pigment occurring in the hair, skin, and iris of the eye in people and animals
Pedigree A diagram that shows the occurrence of a genetic trait in several generations of a family. Heterozygous individuals in which a disease causing allele remains hidden
Genetic Carrier Heterozygous individuals in which a disease causing allele remains hidden
Temperature-Dependent Sex Determination sex is determined by egg incubation temperature
Genomic Imprinting genes whose expression is affected by the sex of the transmitting parent
Translocation Change to a chromosome in which a fragment of one chromosome attaches to a nonhomologous chromosome.
gene duplication one chromosome may have 2 copies of a gene or genes due to unequal crossing over
DNA methylation The addition of methyl groups to bases of DNA after DNA synthesis; controls which genes are turned on or off or how frequently the gene is expressed
Created by: rathburn74
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