Mendelian Genetics

Who is known as the "father of genetics"?

• Charles Darwin

• Karl Ernst von Baer

• Gregor Mendel

• Francis Franklin

Alleles (example: H or h) are alternative forms of a gene. How many alleles does a baby guinea pig inherit from their mother?

• 1

• 2

• 23

• whichever one is dominant

A HETEROZYGOUS individual would have the genotype:

• Hh

• hh

• HH

• Hi

In humans, blue eyes are a recessive trait. What genotype would a blue eyed child have?

• BB

• Bb

• bb

• None of the above, brown eyes are dominant.

In pea plants, tall (T) plant alleles are dominant to short (t) plant alleles. If two tall plants (each with the genotype Tt) are crossed, what is the probability that the cross would result in a short pea plant?

• 25%

• 50%

• 75%

• 100%

Brown eyes (B) are dominant to blue eyes (b). Determine the phenotype for a child with the genotype - Bb

Tt is-

• homozygous dominant
• homozygous recessive
• heterozygous
• none of these

If a pea plant were homozygous recessive for height, how would its alleles be represented?

• TT
• Tt
• tt
• tT

In humans, freckles (F) on the skin are dominant to no freckles (f).  If a heterozygous parent and a recessive parent conceive, what is the chances of having a child with NO FRECKLES?

• 0%

• 50%

• 100%

Having freckles is a dominant trait in humans.  A girl has freckles, but her brother does not. What do we know for certain about the parents?

• both parents have at least one recessive allele

• both parents are heterozygous for freckles

• one of the parents does not have freckles