Biology Chapter 11 - Genetics

Gregor Mendel used pea plants to study ___.

• flowering

• gamete formation

• the inheritance of traits

• cross-pollination

Gregor Mendel removed the male parts from the flowers of some plants in order to ___.

• prevent hybrids from forming

• prevent cross-pollination

• stimulate self-pollination

• make controlled crosses between plants

The chemical factors that determine traits are called ___.

• alleles

• traits

• genes

• characters

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Gregor Mendel concluded that traits are ___.

• not inherited by offspring

• inherited through the passing of factors from parents to offspring

• determined by dominant factors only

• determined by recessive factors only

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The principle of dominance states that ___.

• all alleles are dominant

• all alleles are recessive

• some alleles are dominant and others are recessive

• alleles are neither dominant nor recessive

When you flip a coin, what is the probability that it will come up tails?

• 1/2

• 1/4

• 1/8

• 1

Organisms that have two identical alleles for a particular trait are said to be ___.

• hybrid

• homozygous

• heterozygous

• dominant

What principle states that during gamete formation genes for different traits separate without influencing each other's inheritance?

• principle of dominance

• principle of independent assortment

• principle of probabilities

• principle of segregation

A Punnett square shows all of the following EXCEPT ___.

• all possible results of a genetic cross

• the genotypes of the offspring

• the alleles in the gametes of each parent

• the actual results of a genetic cross

Situations in which one allele for a gene is not completely dominant over another allele for that gene are called ___.

• multiple alleles

• incomplete dominance

• polygenic inheritance

• multiple genes