Genes & DNA Flashcards
the number of sets of chromosomes (or copies of the genome) that a cell contains
Ploidy
________ store their genome in multiple linear chromosomes.
Eukaryotes
What are the monomers of nucleic acids?
nucleotides
2 sets of chromosomes
diploid
mutations that affect only the individual in which they occur
Somatic
1 set of chromosomes
haploid
What are the polymers of nucleic acids?
DNA & RNA
Translation is carried out by ____ and the _______, which is made by RNA and proteins.
tRNA’s; ribosome
large double stranded DNA molecules with a unique DNA sequence
Chromosome
Adenine binds to…
thymine
a specific location on a chromosome
Genetic locus
A gene ALWAYS encodes…
RNA
DNA strands are made by…
joining nucleotides together
________ store their genome in a singular circular chromosome.
Prokaryotes
the DNA sequence of a gene is read as a template to create a new RNA molecule
Transcription
a DNA sequence that encodes an RNA molecule and sometimes a protein sequence
Gene
Any mutation that has no effect on the organism is considered…
neutral
2 sister chromatids with condensed DNA joined at a centromere
Mitotic chromosomes
A gene SOMETIMES encodes…
proteins
Guanine binds to…
cytosine
a singular chromosome condensed for mitosis
Chromatid
If an individual is _______ for a certain allele, it means that the individual received the same allele from each parent.
homozygous
Gene expression involves…
ribosomes, translation, protein synthesis
New DNA and RNA molecules are synthesized…
5’ to 3’
all of the genetic information (DNA base pairs) that an organism has
Genome
the substitution of one base pair for another in double-stranded DNA
Point Mutation
2 copies of the same chromosome
Sister chromatids
Transcription is carried out by a protein complex called…
RNA polymerase
a specific version of a gene
Allele
Cells always have an equal proportion of _____ and ______.
purines; pyrimidines
The ______ _____ is formed by 2 strands of DNA.
double helix
mutations that are passed from parent to offspring
Germ-line
a method to visualize chromosomes’ number and ploidy
Karyotypes
the sequence of a gene is read to create a protein with a specific amino acid sequence
translation
the flow of genetic information from genes to RNA to proteins
Gene Expression
Information is always read….
3’ to 5’