Genetics review

Mendel’s principles of genetics apply to

• plea plants only

• plants only

• all organisms

• animals only

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What does the law of dominance state?

• all alleles are recessive

• no alleles are dominant

• some alleles are dominant and some are recessive

what is heredity?

• the passing of traits from parents to offspring

• the study of heredity

• the study of genetics

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What is an allele?

• same forms of a gene

• different forms of a gene

• 3 letters

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The scientific study of how traits are inherited by offspring from their parents is called

• Heredity

• Genetics

• Mendelism

• Phenotype

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The term phenotype refers to an organisms _______

• Genetic code

• Physical appearance

• Alleles

• None of these are correct

In goats, having horns is dominant and no horns is recessive. If a goat that is heterozygous for horns crosses with one that does not have horns, what are the genotypes of the parents?

• all HH

• all hh

• HH, hh

• Hh, hh

• None of these are correct

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From the PTC lab, we found that tasting for PTC is a dominant trait. Is it possible for a non-taster to have a taster as a parent?

• Yes, because both parents could be heterozygous and carry the trait without expressing it.

• No, because neither parent expressed the trait.

• Yes, this could be the result of a homozygous taster and homozygous non-taster

• No, because I still don't understand how genetics works.

The combination Tt represents a ___ genotype

• homozygous dominant

• homozygous recessive

• heterozygous dominant

• purebred dominant

In our Tt example, capital T means ___, and little t means ___

• recessive, dominant

• dominant, recessive

• homozygous, heterozygous

• good, bad

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