Genetics - Intro

Gregor Mendel used pea plants to study

• flowering

• gamete formation

• the inheritance of traits

• cross-pollination

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

The principles of probability can be used to

• predict the traits of the offspring produced by genetic crosses

• determine the actual outcomes of genetic crosses

• predict the traits of the parents used in genetic crosses

• decide which organisms are best to use in genetic crosses

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

• hybrid

• homozygous

• heterozygous

• dominant

situations in which one allele for a gene is not completely dominant over another allele for that gene is called

• multiple alleles

• incomplete dominance

• polygenic inheritance

• multiple genes

A cross of a red cow with a white bull produces all roan offspring. this type of inheritance is known as

• incomplete dominance

• polygenic inheritance

• codominance

• multiple alleles

Mendel's principles of genetics apply to

• plants only

• animals only

• pea plants only

• all organisms

Gametes have

• homologous chromosomes

• twice the number of chromosomes found in body cells

• two sets of chromosomes

• one allele for each gene

Gametes are produced by the process of

• mitosis

• meiosis

• crossing-over

• replication

Unlike mitosis, meiosis results in the formation of

• diploid cells

• halpoid cells

• 2N gaughter cells

• body cells