Genetics

A DNA molecule is shaped like a

• long, thin rod

• straight ladder

• triple helix

• double helix

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NGSS.HS-LS1-1

What does the notation TT mean to geneticists?

• homozygous dominant alleles

• heterozygous alleles

• homozygous recessive alleles

• one dominant and one recessive alleles

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NGSS.HS-LS3-1

The different forms of a gene are called

• alleles

• chromosomes

• masks

• traits

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

What does a Punnett square show?

• all the possible outcomes of a genetic cross

• only the dominant alleles in a genetic cross

• only the recessive alleles in a genetic cross

• all of Medel's discoveries about gnetics crosses

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NGSS.HS-LS3-1

The passing of traits from parent to offspring

• Heredity

• Genetics

• Hybrid

• Probability

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Who was the father of genetics

• Sagan

• Issac Newton

• Gregor Mendel

• C.jenkins

The study of heredity and the variation of inherited characteristics

• gene

• genetics

• meiosis

• hybrid

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which is heterozygous?

• Tt

• TT

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NGSS.HS-LS3-2

NGSS.HS-LS4-3

Which is homozygous?

• Zz

• SS

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NGSS.HS-LS3-1

A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

• 100% BB

• 75% BB and 25%Bb

• 50 % BB and 50% Bb

• 50% Bb and 50% bb

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NGSS.HS-LS3-1

NGSS.HS-LS3-2