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Exam 12: Patterns of Inheritance

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Question 21

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In a heterozygous individual,the allele being expressed is

A) recessive.
B) codominant.
C) pleiotropic.
D) dominant.
E) epistatic.

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Question 22

Multiple Choice

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Knight followed up on attempts of English farmers to improve varieties of agriculture with his studies on garden peas.When he crossed two true-breeding varieties,he found all of the following: Check all that apply.

A) All the F₁ offspring had the dominant trait.
B) If both parents have the same trait,then all of their offspring will also have that trait.
C) Some F₂ offspring had the dominant trait and some had the recessive trait.
D) Among the F₂ offspring,more had the dominant trait and fewer had the recessive trait.

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Question 23

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The independent assortment of allele pairs is due to

Mendel chose the garden pea for his work on inheritance for which of the following reasons? Check all that apply.

A diploid individual carrying two different alleles at a given gene locus is called

In rabbits,there is a gene that controls ear length,with a dominant allele "T" for long ears and a recessive allele "t" for short ears.At another gene locus,there are alleles "B" for black coat and "W" for white coat.Neither the B or W allele is dominant,and BW produces a gray coat.These two allele pairs assort independently.If a gray rabbit that is heterozygous at the gene locus controlling ear length is mated with a white rabbit that is also heterozygous at the gene locus controlling ear length,what is the probability that their first offspring will be gray with long ears?

A Punnett square is generally used to

In watermelons,the gene for green color is dominant over its allele for striped color.At another gene locus,the gene for short shape is dominant over its allele for long shape.These two allele pairs assort independently.If a plant with long,striped fruit is crossed with a plant that is heterozygous for both of these traits,what percentage of the offspring do you expect will be short and green? (Enter the number only without the percent sign.For example,enter 100% as 100 and enter 12.5% as 12.5)

An allele for a particular trait that is only expressed in the presence of a second copy of the same allele is called

Sometimes,when Mendel crossed two pea plants with each other,he obtained a phenotypic ratio of 3:1 purple-flowered pea plants to white-flowered pea plants.These results are consistent with which set of parents?

A diploid individual carrying two identical alleles at a given gene locus is called

The allelic make up of a cell or individual is referred to as its

The ________ of an organism refers to the alleles that are present.

The observable expression of the genes present in an organism is called its

Let P = purple flowers and p = white,and T = tall plants and t = dwarf.What are the genotypes of the gametes that are produced by a plant that is heterozygous for both traits?

Mendel's understanding of the inheritance of traits in peas,expressed in modern language,included: Check all that apply.

The first detailed and quantitative studies on inheritance were carried out by an Austrian monk named ________.

A male fruit fly has the genotype PpYYrrTt.In terms of these 4 allele pairs,how many different types of gametes can he form?

A woman with blood type O has a child with blood type O.She claims that a man named Ralph is the child's father.Her claim would be proven false if Ralph has blood type: Check all that apply.

During his experiments with pea plants,Mendel referred to the trait that was expressed in the F₁ or first filial generation as