Bio 1201 Unit: QUESTIONS AND ANSWERS

Bio 1201 Unit: QUESTIONS AND ANSWERS


Homozygous
An organism that has two identical alleles for a trait (EX: AA, aa)
Heterozygous
An organism that has two different alleles for a trait (EX: Aa)
Dominant
Requiring only a single copy in order to express the associated trait or characteristic
Recessive
Requiring that no copies of the dominant form be present in order to express the
associated trait or characteristic
Allele
A gene variant
Genotype
The genetic composition of an organism
Phenotype
The physical traits associated with a particular genetic composition
Autosomal
Occurs on a non-sex chromosome
X-linked
Occurs on an X chromosome
Central dogma
The idea that DNA is transcribed into mRNA which is translated into proteins which help
in part to replicate DNA.
DNA to mRNA
A to U
T to A
G to C
C to G