Mendelian Review

In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents?

• 100%
• 75%
• 50%
• 25%

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NGSS.HS-LS3-1

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The observable traits of an organism are known as its

• allele
• dominance
• phenotype
• genotype

Each parent contributes one of the genes for a particular trait. The genes of the pair are called:

• variables
• gametes
• hybrids
• alleles

A feature regulated by a set of genes (allele) passed on

from parents to offspring. Also called inherited traits.

• Heterozygous

• Mendel

• Chromosome

• Traits

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NGSS.HS-LS3-1

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Passing on traits from parents to offspring

• Chromosome

• Genotype

• Heredity

• Allele

Tags

NGSS.HS-LS3-1

The study of heredity

• Genetics

• Genome

• Allele

• Punnett Square

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

The instructions of this allele are covered up by the other allele in a homologous pair. Symbolized by a small letter.

• Homozygous

• Dominant

• Recessive

• Genetics

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NGSS.HS-LS3-1

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The letter symbols for both homologous alleles.

BB Bb bb AA Aa aa

• Genotype

• Phenotype

• Recessive

• Dominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A genotype where one dominant and one recessive allele was passed on from both parents for one trait.

Bb Aa Tt Ll

• Allele

• Homozygous Dominant

• Homozygous Recessive

• Heterozygous

Tags

NGSS.HS-LS3-1

The observable traits dictated by the genotype

• Phenotype

• Genotype

• Homozygous Recessive

• Homozygous Dominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2