Genetics - Vocabulary

Allele

• Patrick Star's siren sound

• a different version of a gene

• A piece of DNA that codes for a trait

Tags

NGSS.HS-LS3-1

Genotype

• the combination of alleles an organism has

• a type of person named Geno

• The way an organism looks

Tags

NGSS.HS-LS3-1

homozygous

• both alleles in a genotype are different

• both alleles in a genotype are the same

phenotype

• the way an organism looks

• A section of DNA

• The allele combination an organism has

recessive gene

• only expressed in homozygous pairings

• always expressed when present

heterozygous

• both alleles in a genotype are different

• both alleles in a genotype are the same

Tags

NGSS.HS-LS4-2

dominant gene

• only expressed in homozygous pairings

• always expressed when present

What type of cells are these?

• somatic

• gamete

23 chromosomes

• homologous chromosome

• sex chromosome

• sexual reproduction

• haploid

This image shows chromosomes during Prophase 1. Which of the following correctly describes the process shown?

• segregation of sister chromatids
• condensation and segregation of alleles
• mutationin which the DNA content of the gene is altered
• crossing - over in which alleles are exchanged