Science flahscards week 6

Question 1

What does The Nucleus consist of?

Answer 1

membrane bound control center of
cell containing X-shaped structures called
chromosomes.

Question 2

What does the Chromosomes consist of?

Answer 2

X-shaped structure
consisting of a single DNA molecule.

Question 3

What is a DNA Molecule?

Answer 3

consisting of genes, the
“code of life”

Question 4

What does the organism consist of?

Answer 4

½ genes mom + ½ genes dad

Question 5

What is Interphase?

Answer 5

chromosomes can not be seen;
doubling of chromosomes; nuclear membrane
present; 99% of cell life.

Question 6

What is Prophase?

Answer 6

spindle fibers form; chromosomes seen.

Question 7

What is Metaphase?

Answer 7

chromosomes line up in the Middle,no nuclear membrane.

Question 8

What is Anaphase?

Answer 8

chromosomes move Apart (Away).

Question 9

What is Telophase?

Answer 9

Two joined cells; two nuclear
membranes form.

Question 10

What is the definiton of Cytokinesis ?

Answer 10

Two separated daughter cells form.

Question 11

What is Asexual Reproduction?

Answer 11

parent/daughter cells identical appearance.

Question 12

What is cancer?

Answer 12

certain DNA mutations cause cells to divide in an uncontrolled way.

Question 13

What cause cancer?

Answer 13

1.Chemicals
2.Radiation
3.Hereditary

Question 14

What are the three treatments for cancer?

Answer 14

1.Surgery
2.Radiation
3.Chemotherapy

Question 15

How do you prevent cancer?

Answer 15

avoid smoking, eat healthy diet,
protect skin from bright sunlight. Vitamins may help.

Question 16

What is a punnet square?

Answer 16

is a technique used to predict what percentage of offspring (children) will be likely to
have a particular trait (physical feature).

Question 17

What is a trait?

Answer 17

physical (behavioral) feature of organism.

Question 18

What does dominant mean?

Answer 18

It means that it shows.

Question 19

What is recessive?

Answer 19

often hidden(weak)

Question 20

Whats an offspring?

Answer 20

A child.

Question 21

Whats a gene?

Answer 21

allele (dad) + allele (mom)

Question 22

Whats an allele?

Answer 22

(part of gene)

Question 23

what is a purebred?

Answer 23

Purebred (homozygous)= same alleles (gene);

Question 24

What is a hybrid?

Answer 24

mixture of alleles

Question 25

Is a dominant capital?

Answer 25

Yes

Question 26

Is a recessive lower case?

Answer 26

Yes

Question 27

What is a genotype?

Answer 27

the genetic makeup of an organism

Question 28

What is a phenotype?

Answer 28

the physical observable appearance of an organism.

Question 29

What is sexual reproduction?

Answer 29

Two parents (male, female)
daughter cells are an mixture/combination of
genes compared to parent cell (by crossover).

Question 30

What is cell division?

Answer 30

growth (embryo, fetus, infancy → adulthood) and repair/maintanence of an organism.