what process results in an exchange of genes between homologous chromosomes?

Mendel believed that the characteristics of pea plants are determined by the:

A) inheritance of units or factors from both parents
B) inheritance of units or factors from one parent
C) relative health of the parent plants at the time of pollination

Genetic disorders can be caused by ______ or recessive alleles.

________ are used to study human inheritance patterns.

A diagram that traces the inheritance of a particular trait through several generation.

DNA replication takes place only once during meiosis, and it results in _______ haploid gametes.

An allele is:

A) another word for a gene
B) a homozygous genotype
C) one of several possible forms of a gene

______ is a genetic disorder that affects mucus and sweat secretions.

A) cystic fibrosis
B) albinism
C) galactosemia

In pedigree, males are represented by

A) line
B) squares
C) circles

Which of the following distinguishes prophase 1 of meiosis from prophase of mitosis?

A) homologous chromosomes pair up
B) spindle forms
C) nuclear membrane breaks down

At what stage does a cell spend most of its life?

Phenotype refers to the ______________________ of an individual.

A) genetic makeup
B) actual physical appearance
C) recessive alleles

_________ is caused by altered genes, resulting in absence of the skin pigment melanin in hair and eyes.
A) cystic fibrosis
B) albinism
C) galactosemia

In pedigree, females are represented by

A) line
B) squares
C) circles

Meiosis is a type of cell division that produces:

A) chromosomes
B) DNA
C) gametes

The chromosomes that make up a pair, one chromosome from each parent, are called __________

When the genotype consists of a dominant and a recessive allele, the phenotype will be like _________________ allele.

A) the dominant
B) the recessive
C) neither

Huntington's disease affects the _______ system.
A)respiratory
B) nervous

True or False? A pedigree is a quick way to see all the genotypes and phenotypes in an entire family.

The idea that for any particular trait, the pair of alleles of each parent separate and only one allele from each parent passes to an offspring is Mendel's principle of:

A) independent assortment
B) hybridization
C) segregation

A cell with a diploid number of 24 undergoes meiosis, how many chromosomes are in each daughter cell?

A) 12
B) 24
C) 48

The idea that different pairs of alleles are passed to offspring independently is Mendel's principle of:

A) unit inheritance
B) segregation
C) independent assortment

____________ has a small body size and limbs that are comparatively short.

A) Huntington's
B) Achondroplasia
C) albinism

True or False? A male with diabetes would be represented by a half filled circle.

which would most likely cause lung cancer?

A) exposure to asbestos particles
B) exposure to fungus spores
C) exposure to ultraviolet radiation