monohybrid crosses

Who is the father of genetics?

• Charles Darwin

• Gregor Mendel

• Dimitri Mendeleev

• Albert Einstein

The passing of genetic traits from parent to offspring is known as

• heredity

• trait

• gene

• allele

having two of the same genes for the trait (sometimes called purebred).

• homozygous
• hetrozygous
• protein
• chromosome

having two different genes for a trait (sometimes called hybrid).

• protein
• homozygous
• heterozygous
• genotype

An allele whose trait is always expressed when it is present in the organism.

• recessive allele

• dominant allele

• hidden allele

• present allele

An allele whose trait is only expressed when no dominant allele is present.

• hidden

• dominant

• recessive

• present

Which of the following genotypes would be considered heterozygous?

• BB

• bb

• Tt

• TT

Which of the following alleles is homozygous recessive?

• Tt
• tt
• TT
• T

A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?

• 25%
• 50%
• 75%
• 100%

Brown (B) is dominant over white (b). Which genotype is a purebred for brown fur?

• BB
• Bb
• bb
• All of the above