Mendelian genetics

A useful device for predicting the possible offspring of crosses between different genotypes is the ______.

• law of dominance

• law of independent assortment

• Punnett Square

• Test cross

What is an organism's phenotype?

• the combination of alleles that the organism received from it's parents

• the organisms physical appearance

• the number of dominant or recessive alleles for a certain trait

• the genes that an organism has for a certain trait

Which of the following describes an organism that has the genotype Cc

• homozygous

• heterozygous

• inbred

• all of these

What is an organism's genotype?

• the combination of alleles it received from it's parents

• the letters that are used to represent a dominant or recessive trait

• both of the above

• none

A dog's phenotype can be determined by ___.

• looking at the dog's parents

• examining the dog's chromosomes

• mating the dog and examining the offspring

• looking at the dog

What is an organism's phenotype?

• the combination of alleles that the organism received from it's parents

• the genes that an organism has for a certain trait

• the organisms physical appearance

• the number of dominant or recessive alleles for a certain trait

Mendel's law of segregation states that during meiosis, the factors that control each trait can separate and only ___ from each pair is/are passed to the offspring.

• one factor

• two factors

• the dominant trait

• the recessive trait

In horses, the trotting gait is dominant to pacing gait. Cross a hybrid trotter with a pacer. What are the potential phenotypes of the offspring?

• 100% trotter

• 100% pacer

• 50% trotter, 50% pacer

• 75% trotter, 25% pacer

Genes located on homologous chromosomes may have alternate forms that control different forms of a trait. These alternate forms are called____. 

• alleles

• centromeres

• phenotypes

• gametes

the alleles present for a trait are the same

• homozygous

• heterozygous

• heredity

• fertilization