Unit 2 Test: Vocab Flashcards
The scientific study of heredity
Genetics
A specific characteristic used to describe an organism
Trait
The offspring of crosses between parents with different traits
Hybrid
The different forms of a gene
Allele
The separation of alleles during gamete formation
Segregation
Physical characters or trait
Phenotype
Genetic makeup of an organism
Genetype
When one allele is not completely dominant over another
Incomplete dominance
When both alleles contribute to the phenotype
Codominance
When individual genes have more than two alleles
Multiple alleles
Traits controlled by 2 or more genes
Polygenic traits
process of reductive division where the number of chromosomes are cut in half
Meisois
Unit containing a sugar, a phosphate group, and a nitrogen base, makes up DNA
Nucleotide
DNA and proteins packed together, which makes up eukaryotic chromosomes
Chromatin
Duplication of DNA by copying
Replication
Enzyme that joins nucleotides together and proofreads the DNA strand during replication
DNA polymerase
A type of RNA that is responsible for caring instructions (MRNA)
Messenger RNA
RNA that transfers each amino acid to its specific ribosome (tRNA)
Transfer RNA
Production of RNA by copying the nucletide sequence of DNA
Transcription
Specific base sequences where RNA polymerase binds during transcription
Promoter
Sequences of nucleotides that are NOT involved in coding proteins
Intron
Sequences of nucleotides that are involved in coding proteins
Exon
Process of producing proteins by attaching amino acids together
Translation
Set of photographs of chromosomes grouped in order of pairs
Karyotype
Chromosomes that determine an organism’s sex
Sex Chromosome
Chromosomes that DO NOT determine an organism’s sex
Autosome
Chart that shows the relationships within a family, used to track genetic disorders and traits.
Pedigree
Gene that is located on the X or Y chromosome
Sex-linked gene
Error in meiosis in which homologous chromosomes fail to seperate
Nondisjunction
Principle that states that adenine/thymine base pair and that guanine/cytosine base pair
Chargaff’s rule
Is the name of enzyme that unzips DNA during replication
Helicase