Genetics Practice

A genotype describes the physical characteristics of an individual.

• True

• False

A phenotype describes the genetic make-up of an individual.

• True

• False

When Mendel crossed true-breeding tall plants (TT) with true-breeding short plants (tt), all of the offspring were tall because...

• The allele for tall plants is recessive.

• The allele for short plants is dominant.

• The allele for tall plants is dominant

What is the relationship between phenotype and genotype?

• The phenotype determines the genotype.

• The genotype determines the phenotype.

• There is no relationship between phenotype and genotype.

Tt is an example of...

• Homozygous Dominant

• Heterozygous

• Homozygous Recessive

Multiple alleles refer to an inheritance pattern that has more than two alleles that control phenotype.

• True

• False

Which option below best describes polygenic inheritance?

• More than one set of genes contributing to the phenotype

• A blending of genes getting an intermediate phenotype

• A phenotype that has more than 2 possible alleles for a gene

A white rose and a red rose produce a pink rose, which type of inheritance does this show?

• incomplete dominance

• codominance

• Multiple alleles

• Polygenic inheritance

A kitten has spots and stripes. The mother has stripes and the father has spots. Which law of inheritance does this show?

• incomplete dominance

• codominance

• multiple alleles

• polygenic inheritance

Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.

• 23, 46
• 46, 23
• 2, 4
• 50, 100