Study unit 2.2 Heredity + Behavior Flashcards
1
Q
Chromosomes
A
Threadlike strands of DNA (deoxyribonucleic acid) molecules that carry genetic information
2
Q
Genes
A
Biochemical messengers or DNA segments that serve as the key functional units in hereditary transmission.
3
Q
Polygenic traits
A
Influenced by more than one pair of genes
4
Q
Identical twins (monozygotic)
A
A single egg that splits for unknown reasons, they share the same genetic blueprint and have a 100% overlap.
5
Q
Fraternal (dizygotic)
A
Two separate eggs are fertilized simultaneously, and they have a 50% overlap.
6
Q
Evolution
A
Gene pool in a population changes gradually due to selection pressures.
7
Q
Adaptation
A
Inherited characteristics increased in the population because it helped solve a problem of survival or reproduction during the time it emerged.
