Unit 3 Study Sheet

Question 1

What is the smallest unit of life?

Answer 1

Cell

Question 2

What is the biggest organelle of a eukaryotic cell?

Answer 2

A nucleus

Question 3

What is found in the nucleus?

Answer 3

DNA

Question 4

What is DNA and what does it stand for?

Answer 4

DNA contains genetic material and it stands for Deoxyribo-Nucleic-Acids

Question 5

What does DNA look like inside the nucleus?

Answer 5

DNA looks like a double stranded ladder and jumbles up like a ball of yarn

Question 6

What is genetic material?

Answer 6

Genetic material are genes or traits that can be passed on from parents to offspring

Question 7

How does DNA grow and develop and reproduce?

Answer 7

DNA reproduces through stages called Inter-Phase and Mitosis.

Question 8

What happens during inter-phase?

Answer 8

Inter-phase is when DNA develops and goes through replication.

Question 9

What does replication mean?

Answer 9

copy or duplicate

Question 10

What happens during replication?

Answer 10

DNA replicates itself and wrap up tightly and neatly into a chromatid.

Question 11

What is a chromatid?

Answer 11

A DNA is neatly wrapped up into 2 Chromatin

Question 12

What is a chromosome?

Answer 12

When DNA is wrapped up with protein it is call a chromosome

Question 13

How many chromosomes do humans have?

Answer 13

Humans have 46 chromosomes

Question 14

How many chromosomes does each parent pass on to their offspring?

Answer 14

23 chromosomes from each parent

Question 15

Each segment of DNA is known as what?

Answer 15

Gene

Question 16

What does a gene contain?

Answer 16

Genetic traits

Question 17

What are the 5 phases of mitosis

Answer 17

Prophase;Metaphase;Anaphase;Telophase;Cytokinesis

Question 17

What happens during mitosis

Answer 17

During mitosis chromosomes go through 5 phases

Answer 30

q