Lecture 9: Patterns of Inheritance

Question 1

Who is considered the “father” of genetics?

Answer 1

Gregor Mendel

Question 2

What does the term “dominant” mean in genetics?

Answer 2

That when present, the gene expresses itself (as a protein).

Question 3

What does the term “recessive” mean in genetics?

Answer 3

That the gene can only express itself (by producing proteins) when a dominant gene is not present.

Question 4

When you have two dominant genes (AA), you are ___.

Answer 4

Homozygous Dominant

Question 5

When you have two recessive genes (aa), you are ___.

Answer 5

Homozygous Recessive

Question 6

When you have two alternate forms of the gene in the allele (Aa), you are ___.

Answer 6

Heterozygous

Question 7

An individual that is heterozygous (Aa) can produce two gametes. How are these gametes made?

Answer 7

Through meiosis

Question 8

How many different gametes can a person who is AABb make?

Answer 8

2

Question 9

Snapdragons are flowers that can come in red, white and pink. What kind of genetics cross is this?

Answer 9

Incomplete Dominance

Question 10

Blood type is an example of co-dominance genetics crosses. What blood type is considered the “universal donor”?

Answer 10

Type O-

Question 11

Which chromosome are sex-linked traits located?

Answer 11

X chromosomes

Question 12

How many sex chromosomes do you have?

Answer 12

Two

Question 13

In addition to sex-chromosomes, you have 44 ____ chromosomes.

Answer 13

Autosome

Question 14

Males have the ____ sex chromosomes.

Answer 14

XY

Question 15

Females have the ____ sex chromosomes.

Answer 15

XX

Question 16

In a male, where does he inherit his Y chromosome from?

Answer 16

His father

Question 17

In a male, where does he inherit his X chromosome from?

Answer 17

His mother

Question 18

In a female, where does she inherit her X chromosomes from?

Answer 18

Both her mother and father