Heredity

Question 1

Pure dominant genotype

Answer 1

BB

Question 2

Pure recessive genotype

Answer 2

bb

Question 3

Hybrid genotype

Answer 3

Bb

Question 4

Heterozygous Jeanpair

Answer 4

Bb

Question 5

Homozygous Jean pair

Answer 5

BB or bb

Question 6

Dominant allele

Answer 6

B

Question 7

Recessive allele

Answer 7

b

Question 8

When a pure dominant trait is crossed with a pure recessive trait, which trait will express itself and all the offspring? Dominant or recessive? Give an example.

Answer 8

Dominant because dominant alleles cover the recessive and all the offspring will have a heterozygous genotype

Question 9

What type of genotype is necessary for a recessive trait to appear

Answer 9

Pure recessive (bb)

Question 10

If a person is a carrier for disease but does not have the disease, how would you describe the condition of the alleles

Answer 10

Heterozygous/hybrid

Question 11

What is a gene?

Answer 11

A small section of DNA that carries a specific code for a trait

Question 12

Different forms of a gene are called?

Answer 12

Alleles

Question 13

List the following in order from smallest to largest: chromosome, allele, nucleus, nitrogen base pair (adenine & thymine), DNA

Answer 13

Nitrogen base pair, allele (gene) DNA, chromosome, nucleus

Question 14

What is a pedigree used for?

Answer 14

To trace the inheritance of a specific trait in a family

Question 15

On a pedigree what did the squares represent?

Answer 15

Male

Question 16

On a pedigree what does it mean if the circle is half shaded?

Answer 16

Carrier but does not express the recessive trait

Question 17

What is the difference between genetic engineering and selective breeding?

Answer 17

Genetic engineering is the actual DNA is altered in someway by inserting a needed Jane directly into the persons cells
Selective breeding is specific traits are selected in the parents in order to ensure they are passed on in the offspring and the genes are not actually altered

Question 18

List some positive uses for selective breeding

Answer 18

The traits can be easily predicted. You can produce offspring that can serve a specific purpose

Question 19

List some benefits of genetic engineering and give specific examples

Answer 19

Make medication and treat diseases: create bacterial cells that produce important human proteins such as insulin
cure human genetic disorders: use virus to deliver the gene to cells in the lungs of someone with cystic fibrosis

Question 20

What is the purpose of DNA in the nucleus of a cell?

Answer 20

To carry the codes that contain information about the proteins needed to form specific proteins needed to build certain traits that the organism can express

Question 21

What is incomplete dominance?

Answer 21

When both alleles express themselves as a blend and neither allele dominates the other allele