Chromosomes, Genes, Alleles, & Traits

What is Gregor Mendel's nickname?

• The Priest of Peas

• The Father of Genetics

• The Dad of DNA

• The Grandfather of Genes

In genetics what is meant by 'a cross'?

• When the DNA of one organism's sex cell combines with the DNA of another organisms's sex cell and the traits of the resulting offspring are observed

• When an allele from one parent is changed during crossing over in meiosis

• When Gregor Mendel got mad with his pea plant results

• When the genes of an individual are studied to see which traits they have

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What is the definition of Genotype?

• The diagram that shows all the chromosomes of an individual

• The combination of alleles that control that an individual has for a particular trait

• How many genes on one chromosome

• How a trait is expressed (what it looks like or what it does)

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Hair color and eye color are examples of a person's....

• recessive traits

• dominant alleles

• genotype

• phenotype

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When an organism has two alleles at a particular locus that are different, the organism is called

• purebred

• dominant

• heterozygous

• recessive

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If a pea plant were homozygous recessive for height, how would it's genotype be represented?

• Tt

• TT

• tt

• tT

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The passing of traits from parents to offspring is known as....

• hierarchy

• heredity

• traits

• genetics

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What is the definition of Phenotype?

• The diagram that shows all the chromosomes of an individual

• The combination of alleles that control that an individual has for a particular trait

• How many genes on one chromosome

• How a trait is expressed (what it looks like or what it does)

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Which of the following statements are TRUE? (3)

• An allele is a form of a gene

• Dominant alleles are represented by uppercase letters

• You need two recessive alleles to have a recessive trait

• Homozygous is when two chromosomes with similar traits line up side by side on the spindle during Metaphase II

• You can inherit two forms a gene from your mom, and two forms of the same gene from your dad

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If tongue rolling is a dominant trait (R), which of the following statements are true? (3)

• An individual who can roll their tongue may have the genotype Rr

• An individual who can roll their tongue may have the genotype RR

• An individual who can roll their tongue may have the genotype rr

• An individual who cannot roll their tongue will not have a dominant allele

• An individual with the genotype Rr will be able to partially roll their tongue

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