Genetics And Heredity Unit Review Question Preview (ID: 41631)

Genetics And Heredity Unit Review. TEACHERS: click here for quick copy question ID numbers.

In humans, the allele for having a widow’s peak is dominant to having a straight hairline. Many people do not like the widow’s peak, so they shave it off. Will this affect their offspring?
a) No. Shaving the widow’s peak does not change their genotype, so the allele can still be passed on to offspring.
b) No. Their offspring will have a widow’s peak if they inherit both recessive alleles from the parents.
c) Yes. There is no chance that the offspring will be born with a widow’s peak because the parents destroyed the trait.
d) Yes. Offspring born with a widow’s peak will have a smaller peak because the allele was damaged.

Which scenario is an example of a physical characteristic of an organism that was influenced by environmental factors?
a) The black cat’s eyes were a bright green color.
b) The pumpkin seeds were relatively flat and white.
c) A baby was born with ten fingers and ten toes.
d) The bark of a tree was scarred after a beaver gnawed it.

The trade-offs in choosing to be tested for a genetic disease includes:
a) you might find out you have the disease
b) it may become difficult to get health insurance or coverage
c) both of the above
d) none of the above

Why would it be necessary to see a genetics counselor?
a) to see what family blood line may contain a genetic disorder
b) to know the probability or chance of the offspring inheriting a disease
c) to stay as healthy as possible
d) all of the above

DNA fingerprinting can be used to:
a) identify a person
b) diagnose a genetic disease
c) both of the above
d) none of the above

Diseases that are inherited are usually:
a) caused by genes
b) caused by viruses
c) caused by environmental factors
d) all of the above

What is a trait?
a) different forms of meiosis
b) different forms of a pedigree
c) different forms of chromatids
d) different forms of a characteristic or quality

What is heredity?
a) traits passing from offspring to parents
b) traits passing from parents to offspring
c) plants that are cross-pollinated
d) the ratio of dominant to recessive traits

Two forms of a gene, one from each parent, are called
a) alleles
b) phenotypes
c) albinism
d) genes

What is a phenotype?
a) the way an organism feels
b) a group of five alleles
c) a dominant gene
d) the physical expression of a genotype

Which diagram is used to trace (follow) a trait through generations of a family?
a) pedigree
b) selective breeding
c) meiosis
d) generation square

A plant with two dominant OR two recessive alleles is said to be
a) heterozygous
b) cross-pollinating
c) homozygous
d) hybrid

Two parents are both carriers for a genetic trait that is based on only one recessive allele. This means that their offspring:
a) cannot have the trait
b) will all be carriers for the trait
c) has a 25% chance of inheriting the trait
d) has a 50% chance of inheriting the trait

One of the first people to study patterns of heredity scientifically was:
a) Mary-Claire King
b) Robert Hooke
c) Antoine Madan
d) Gregor Mendel

Which of the following methods (ideas) can provide (give) information on human genetics?
a) breeding other organisms to compare traits
b) studying human pedigrees
c) examining human DNA
d) all of the above

Assume that a genetic trait is represented by the letter a. Which of the following would most likely be used to represent the recessive condition that IS expressed (seen)?
a) AA
b) Aa
c) aa
d) none of the above

Scientists often use other organisms to study genetics. Pea plants are sometimes chosen because:
a) they grow quickly
b) they cause disease
c) they do not have cells
d) they do not reproduce

What is the process called when body cells are copied with half the number of chromosomes at the end of this cell division cycle to create sex cells?
a) sex cells
b) meiosis
c) a nucleus
d) mitosis

Asexual reproduction occurs (happens) in humans in that
a) none of our body cells reproduce this way.
b) many body cells reproduce this way.
c) the parent cells do not divide.
d) meiosis occurs.

How does mitosis compare (different) to meiosis?
a) mitosis produces two identical daughter cells, while meiosis produces sex cells with half the genetic information.
b) mitosis produces sex cells with half the genetic information, while meiosis produces two identical daughter cells.
c) mitosis only occurs in single-celled organisms, while meiosis only occurs in animals.
d) mitosis only occurs in animals, while meiosis only occurs in single-celled organisms.

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