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Exam 13: Observing Patterns in Inherited Traits

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Question 21

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__________ refers to an individual's observable traits.

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Question 22

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Which of the following states (in modern terms) that a diploid cell has two alleles of every gene-one on each homologous chromosome-that are distributed into separate gametes during meiosis?  

A) Law of segregation
B) Monohybrid cross
C) Law of independent assortment
D) Testcross
E) Allelic inheritance

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Question 23

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A cross of two Kerry horses always produces Kerry offspring.A cross of a Kerry with a Dexter produces 1/2 Kerry and 1/2 Dexter offspring.Crosses of two Dexters produce two Dexters for every Kerry.This pattern of inheritance,in which the F2 generation deviates from the expected ratios,suggests a _______ homozygous recessive trait.

Which of the following is true about Marfan syndrome?  

In radishes,long or round are homozygous forms of an incompletely dominant gene,and oval is the phenotype of the heterozygote.If a long radish is crossed with a round radish,which of the following phenotypic ratios of the F2 generation is correct?  

A pattern of inheritance in which the form of a single trait is collectively determined by alleles of several genes is called _______.  

What pattern of inheritance shows the full and separate phenotypic effects of two alleles that are present in heterozygous individuals?  

Figure 13.10 -The accompanying illustration shows the F₂ phenotypes from a monohybrid cross in snapdragons.What type of inheritance produces such an outcome?  

Which genetic situation could most likely have confounded Mendel in his recognition of independent assortment?  

In which of the following does the environment play a causal role?  

In the garden pea,Mendel found that tall ( D ) plants,green pods ( G ) ,and inflated pods ( C ) were dominant to dwarf (d ) plants,yellow pods ( g ) ,and constricted pods ( c ) . Determine the chances of producing the offspring D__ G__ cc from a cross of D d G g C c x D d G g C c.  

Figure 13.15 -A graph of phenotypic variation similar to the accompanying illustration strongly suggests  

Answer the following questions using the group of answers below. -Animal species X is tetraploid (4n = 12) .Following gene duplication and translocation,a given gene is found on each chromosome.How many alleles for this gene can be present in an individual of this species?

The offspring of a cross between two individuals that breed true for different forms of a trait are __________.

In poultry,rose comb is controlled by a dominant allele,and its recessive allele controls single comb.Crossing a pure-breeding rose comb chicken with a pure-breeding single comb chicken would produce which of the following?  

The ability of rats to cope with stress as adults can be affected by ____.  

Mendel's monohybrid experiment results led to his law of __________.

In a certain plant,when individuals with blue flowers are crossed with individuals with blue flowers,only blue flowers are produced.Plants with red flowers crossed with plants with red flowers sometimes produce only red flowers,although other times they produce either red or blue flowers.When plants with red flowers are crossed with plants with blue flowers,sometimes only red flowers are produced; other times either red or blue flowers are produced.Which of the following is true?  

A breeder of cattle has a herd of white cows and a roan bull.Hair color in this breed is controlled by an incompletely dominant gene.The two homozygous forms are either red or white,and the heterozygous is roan.What colors of calves are expected and in what proportions?  

For Mendel's law of segregation requires that