Genetics VocabularyHESI A2 cheat sheet

The words the questions use

9 key facts 1 practice questions Reviewed Oct 2026

Test yourself Save in app

The 1-minute sheetCinnaEntry

Basics

Gene — a DNA segment coding for a trait
Allele — one version of a gene
Genotype — the alleles present; phenotype — what shows

Zygosity

Homozygous — two identical alleles (BB or bb)
Heterozygous — two different (Bb); a carrier if the recessive allele causes disease

Inheritance

Dominant masks recessive
Codominance — both show (AB blood type)
Incomplete dominance — a blend (pink from red and white)

Chromosomes

Humans have 46 (23 pairs); gametes have 23

Key takeaway

The words the questions use

Before you read

Test yourself first: 1 question

Question 1 of 1

The study of heredity and how traits are passed on is called:

CinnaEntry app: the study feed with a practice question

Study Genetics Vocabulary in the appTEAS 7 and HESI A2 question banks with a rationale on every answer and timed practice tests.See how CinnaEntry works

Start free

Want more HESI Biology questions?We'll email you a free set on Genetics Vocabulary. No account needed.

Was this helpful?

Free to start

Know genetics vocabulary cold

TEAS 7 and HESI A2 question banks with a rationale on every answer and timed practice tests.

TEAS 7 & HESI A2 question banks
Rationale on every answer
Timed full-length practice tests
300+ cheat sheets

Start free on the web Download on theApp Store Get it onGoogle Play

See how CinnaEntry works