Chapter 12 Test

How many alleles do you inherit from EACH parent for a specific trait?

• 1

• 2

A tool used to predict the probability of offspring inheriting certain traits is called a ...

• karyotype

• Punnett Square

The study of heredity is called ....

• biology

• genetics

• chemistry

Segments of DNA that code for traits are called ....

• genes

• proteins

• alleles

Cross 2 heterozygous tall pea plants. Tall (T) is dominant to short (t). What fraction of the offspring do you predict will be tall?

• 1/4

• 2/4

• 3/4

• 4/4

Which statement below describes DOMINANT alleles?

• expressed when at least one is present

• only expressed when 2 are present

In the problem shown, what must the genotype of the missing parent be?

• BB

• Bb

• bb

The different forms or versions of a gene are called ...

• alleles

• gametes

Mendel's Law of Segregation is shown on the outside of a Punnett Square. According to this law, the genes from each parent _____ when gametes are formed.

• combine as one

• separate

• mutliply

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%