Genetics/Heredity

 What is heredity?

• Passing of traits from parents to their offspring

• A mutation in DNA that causes diseases

• A combined effect of all the DNA that a person has

• A unit of DNA that is responsible for making one protein

 How many alleles for a specific trait does a heterozygous individual have?

• 3 same

• 2 different

• 2 same

• 3 different

 A unit of DNA that is responsible for making one protein is called ____________.

• heredity

• cloning

• gene

• probability

 What is a trait?

• A specific characteristic that varies from one individual to another

• A mutation in DNA that causes diseases

• A combined effect of all the DNA that a person has

• The data obtained from a study

What is the percentage of genetic traits you get from BOTH parents?

• 25%

• 50%

• 75%

• 100%

Which of the following is an example of a trait inherited from your parents?

• Eye color

• Lung cancer

• Aids

• Diet

 Brian owns a peacock farm. One day, a large batch of eggs hatch and Brian discovers that a few of the chicks are white instead of blue. White chicks can be sold for $100 each, instead of the $50 that people pay for blue chicks. If Brian wants to raise more white peacocks in order to make more money, what should he do?

• He should continue breeding the peacocks the same way.

•  He should always be sure to cross blue peacocks with white peacocks.

• He should isolate the white peacocks and allow them only to breed with each 

                other.

• He should bleach the feathers of the blue peacocks before allowing them to 

                 breed with any white peacocks.

 What are the genotypes of the parents represented in this Punnett square?

• TT and tt

• TT and Tt

• Tt and Tt

• Tt and tt

 Tay-Sachs disease is a recessive disorder. If two people who are carriers of the disease but do not have it themselves produce offspring, what will occur?

• All of their offspring will have Tay-Sachs disease

• Some of their offspring will have Tay-Sachs disease

• None of their offspring will have the Tay-Sachs disease

• None of their offspring will have Tay-Sachs, but all of the grandchildren will

 What percentage of a person’s genes comes from each parent

• 100 percent from the mother

• 100 percent from the father

• 50 percent from the mother 50 percent from the father

• The percentage is different from each person