Genetics 2026

How many chromosomes do humans have?

• 46-- 23 from mom, 23 from dad
• 22--11 from mom, 11 from dad
• 10-- 5 from mom, 5 from dad
• 23

Tags

NGSS.HS-LS3-1

Organisms which have 2 different genes (alleles-letters) for a trait. Tt (hybrid)

• Genotype

• Heterozygous

• Homozygous

• Phenotype

• Test cross

  
  

Shows the gene combinations present.

Ex. TT, Tt, tt

• Genotype

• Heterozygous

• Homozygous

• Hybrid

• Phenotype

Tags

NGSS.HS-LS3-1

Which is a true statements about this picture?

• Brown is recessive
• Brown is dominant
• Blue is dominant
• Blue is codominant

Tags

NGSS.HS-LS3-1

Physical representation of genes.

Ex. Tall, dwarf, Green, yellow

• Genotype

• Heterozygous

• Homozygous

• Phenotype

• Test cross

A ________________________ is used to predict the possible genotype from certain parents

• Mendel Grid
• Genetic Tic Tac Toe
• Punnett Square
• Pedigree Plot

Tags

NGSS.HS-LS3-1

Genotype refers to the ...

• physical expression of the genes
• the possible combination of alleles in a gene
• whether an allele is dominant or recessive
• how an organism will appear

Tags

NGSS.HS-LS3-2

Any change in the sequence of DNA is a

• recombination

• mutation

• chromatin

• independent assortment

Tags

NGSS.HS-LS3-2

 Dominant alleles are-

• capital
• lowercase
• both
• neither

 Recessive alleles are-

• capital
• lowercase
• both
• neither