Genetics Test Review Question Preview (ID: 34202)


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Which of the following is not true of most sex-linked traits?
a) located on the X chromosome
b) located on chromosomes that are not related to sex
c) usually recessive
d) usually seen in males

Purple (P) is a dominant allele, while white (p) is recessive. The results of a testcross are some purple plants and some white plants. What is the genotype of the original purple pea plant?
a) PP
b) Pp
c) pp
d) not enough information

In a pedigree, two normal parents produce a child with a genetic disorder. Based on this information, we know the disorder is caused by...
a) sex-linked allele
b) dominant allele
c) codominant allele
d) recessive allele

Which of the following is a genotype for an individual heterozygous for a trait.
a) Rr
b) tt
c) Pr
d) both a and c

The garden pea plant is a good subject for genetic study because it...
a) is easy to grow
b) has characters in two clearly different forms
c) produces many offspring
d) all of the above

A family history that shows how a trait is inherited.
a) Genetic Disorder
b) Pedigree
c) Probability
d) Punnett Square

A plant with YY alleles for seed color is...
a) heterozygous dominant for this character
b) homozygous dominant for this character
c) homozygous recessive for this character
d) Either a or b

the likelihood that a specific event will occur.
a) Genetic Disorder
b) Pedigree
c) Probability
d) Punnett Square

An inherited disease or condition
a) Genetic Disorder
b) Pedigree
c) Probability
d) Punnett Square

When two alleles from a particular gene are the same
a) Heterozygous
b) Homozygous
c) Phenotype
d) Genotype

A diagram that predicts the outcomes of a genetic cross
a) Genetic Disorder
b) Pedigree
c) Probability
d) Punnett Square

An organism's physical appearance.
a) Alleles
b) Homozygous
c) Phenotype
d) Genotype

When two alleles from a particular gene are different
a) Heterozygous
b) Homozygous
c) Phenotype
d) Genotype

The set of alleles an organism has is its...
a) Homozygous
b) Heterozygous
c) Phenotype
d) Genotype

When two different alleles are present, the allele that has no observable effect on the organism
a) Alleles
b) Dominant
c) Recessive
d) Homozygous

Different forms of a gene are called...
a) Alleles
b) Dominant
c) Recessive
d) Homozygous

When two different alleles are present, the allele that is fully expressed is...
a) Alleles
b) Dominant
c) Phenotype
d) Genotype

When several genes influence a character, the character is said to be...
a) polygenic
b) incompletely dominant
c) codominant
d) completely dominant

Which of the following patterns of heredity can result in an intermediate trait, such as pink flowers produced from a white parent and a red parent
a) multiple alleles
b) incomplete dominance
c) codominance
d) sex-linked alleles

Which of the following is responsible or the seasonal fur color of arctic foxes, which depends on the temperature?
a) multiple alleles
b) incomplete dominance1
c) codominance
d) environmental factors

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