AP Bio Topic 6.4

Which of the following is an example of biological traits?

• personality 
• hair style 
• eye color
• regional accent

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Mendel begins his experiment with purebred pea plants. This approach enabled him to determine that variations among offspring were the results of 

• random mutations
• self-pollination
• genetic uniformity 
• his crossings

When Mendel crossed plants that were purebred purple-flowered with plants that were purebred white-flowered, the resulting offspring all had purple flowers. When allowed to self-pollinate, this F1 generation gave rise to white-flowered plants as well as purple. As a result, Mendel determined that individual traits are

• inherited as discrete units

• diluted in offspring

• merged with successive generations

• lost in the pollination process

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Mendel was able to identify predictable patterns of heredity. He succeeded mainly because he chose to study traits that

• were always dominant 
• tended to be recessive
• could be diluted
• had only two forms

Which  of the following conclusions was a result of Mendel's observations?

• organisms that give rise to purebreds are genetically superior
• organisms that have intermediate features are self pollinating 
• organisms inherit two copies of each gene, one from each parent
• organisms that self pollinate do not have "either-or" features 

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Which phrase best describes the term genome?

• the genetic makeup of a chromosome
• the genes that make up an organism
• the location of a specific set of genes
• the sums of an organisms physical traits

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

• recessive traits
• dominant traits
• 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 

If a pea plant were homozygous recessive for height, how would its alleles be represented 

• Tt
• TT
• tt
• tT

An allele is dominant in a heterozygote when it is

• expressed and the other allele is not
• a very common allele in a population
• the stronger of the two alleles
• more desirable then the  other allele