10/09

Question 1

What is a Dihybrid cross

Answer 1

punnet square that is 4 by 4

Question 2

What is Incomplete Dominance

Answer 2

A type of inheritance in which the phenotype of a heterozygote is intermediate between phenotypes. (like when you have a white flower and red flower, instead of getting a white or red offspring you get pink)

Question 3

What is Codominance

Answer 3

You can show both traits equally. Like if you have an AB blood type, A and B are both dominant but they share codominance.

Question 4

What is Pleiotrophy

Answer 4

Plea = More
Trophy = Change
Pleiotrophy is the control of more than one phenotypic character by a single gene
(gene change that causes more change)

Question 5

What is Polygenic Inheritance

Answer 5

The additive effect of two or more genes on a single phenotypic character.
(examples include height, skin color, diabetes, heart disease, cancer, eye color)

Poly= many
Genic= genes or genetics

Multiple genes interacting

Question 6

What is Epigenetic and role of the Environment

Answer 6

Environmental something that changes your genetics

(young men are told not to work out too hard when they are going through growth because they could stunt their growth)

Epigenetics allows for individuals to adapt to their specific environment.

Question 7

Epigenetic Inheritance

Answer 7

Inheritance of traits transmitted by mechanisms not directly involving the nucleotide sequence of a genome.

Question 8

How long will epigenetic effect offspring?

Answer 8

A trait that passes on from gen to gen but after a while disappears

(don’t fully understand why it stops)

Question 9

Chromosome theory of inheritance

Answer 9

Genes are located at specific positions (loci) on chromosomes and that the behavior of chromosomes during meiosis and fertilization accounts for inheritance patterns.

Question 10

How many genes are on each chromosome

Answer 10

There are thousands of genes on each chromosome

Question 11

Linked Genes

Answer 11

Genes close to each other have a tendency to travel with each other during meiosis and fertilization. this is called a linked gene.

Question 12

What sex chromosome do women have

Answer 12

XX
Two copies of X chromosome means you are a female

Question 13

What sex chromosome do men have

Answer 13

XY
One copy of X and one copy of Y

Question 14

How many genes does an X chromosome contain

Answer 14

X chromosome contain approximately 1100 genes

Question 15

How many genes does a Y chromosome contain

Answer 15

Y chromosome only contain 78