Sci.per1,7th grade

Question 1

what is Mitosis?

Answer 1

A four-stage process that creates two identical cells from one original cell.

Question 2

What is DNA?

Answer 2

A self-replicating material that is in all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.

Question 3

What are Chromosomes?

Answer 3

A thread-like structure into which the DNA molecule is packaged in the nucleus of each cell.

Question 4

What are Offsprings?

Answer 4

New organisms produced by a living thing.

Question 5

What are the four phases of Mitosis?

Answer 5

Prophase, Metaphase, Anaphase, and Telophase

Question 6

What is Asexual Reproduction?

Answer 6

The formation of new individuals from the cell of a single parent.

Question 7

What are Asexual Reproduction advantages?

Answer 7

Numerous offspring can be produced without the loss of energy and mating of a parent.

Question 8

What are Asexual Reproduction disadvantages?

Answer 8

The offspring has no genetic variation, thus making all the offspring identical to one another.

Question 9

What’s is the importance of reproducing?

Answer 9

For the sake of the species to keep living.

Question 10

What is Sexual reproduction?

Answer 10

Reproduction involving the fusion of female and male gamete which forms a zygote that potentially develops into a genetically distinct offspring.

Question 11

What is cancer?

Answer 11

A group of diseases characterized by the uncontrolled and unregulated growth of cells.

Question 12

What are the preventable causes of cancer?

Answer 12

Tabacco, nutrition, UV radiation, infectious exposure

Question 13

What are the characteristics of normal cell growth?

Answer 13

Regulated, predetermined to differentiate into specific cell types, controlled cell death and proliferation, contact inhibition, cell surface adherence, inability to wander.

Question 14

What are the characteristics of cancer cell growth?

Answer 14

Defect in differentiation, secrete enzymes to dissolve binding protein(no cell surface adherence), uncontrolled proliferation, doubling time, loss of cell borders, ability to form new blood vessels, ability to free from tissue or tumor of origin, escape immune surveillance, lack of programmed cell death.

Question 15

What are Mutations?

Answer 15

Permanent change in DNA nucleotide sequence, arise spontaneously or from a mutagen.

Question 16

Who is responsible for our laws of inheritance?

Answer 16

Gregor Mendel (1822-1884)

Question 17

What organism did Mendel study?

Answer 17

Pea Plants

Question 18

What did Mendel notice about offspring traits?

Answer 18

They retained traits of the parents.

Question 19

How is Mendel referred to today?

Answer 19

Father Of Genetics

Question 20

What is a trait?

Answer 20

Characteristic that can be passed from parent to offspring.

Question 21

What is a Punnet Square?

Answer 21

What is used to solve genetic crosses?

Question 22

What is a genotype and write 3 possible genotypes?

Answer 22

Gene combination for a trait
(R,R) (R,r) (r,r) = Genotypes
Red Red Yellow= Phenotypes

Question 23

Name the male and female parts of a flowering plant and explain how pollination occurs.

Answer 23

Male: Stamen
Female: Ovary
Pollen carries sperm to the eggs for fertilized pollination

Question 24

What results from this cross——–> TT x tt?

Answer 24

Hybrid, Tt

Question 25

what results do you get from crossing two hybrids? (Tt) x Tt)?

Answer 25

Tall plant and short

Question 26

What is a Genotype?

Answer 26

The set of genes in our DNA.

Question 27

What is a Phenotype?

Answer 27

The characteristics that are visible.

Question 28

What is a purebred?wo

Answer 28

A product of the two of the same species.

Question 29

What is a hybrid?

Answer 29

The product of two different species.

Question 30

What is an Alelle?

Answer 30

Two different types of DNA