1: How Many Cells Are Produced by a Human Body Every Day?

Name ______Date ______Biology 6.1 Chromosomes 1: How many cells are produced by a human body every day?

2: How many times in life does cell reproduction occur in living organisms?

3: What are gamates?

4: What happens to a cell's DNA when the cell divides?

5: Prokaryotes divide by what type of cell division?

6: What type of reproduction is it when a single parent passes exact copies of its DNA to its offspring?

7: List the 2 stages that Binary Fission occurs in.

8: Describe the process of binary fission.

9: Information encoded in DNA is organized into units called what?

10: What is a gene? How many genes are found in a single molecule of DNA?

11: What important role do genes play?

12: How is the information in DNA used when genes are being used?

13: As eukaryotic cells prepare to divide, what happens to the chromosomes.

14: Before the DNA coils up, it is copied. What are the two exact copies of the DNA called?

1 Name ______Date ______Biology 6.1 Chromosomes 15: The two chromatids of a chromosome are attached at a point called a ______. 16: What are somatic cells?

17: How many chromosomes does each somatic cell contain?

18: What are homologous chromosomes?

19: Where do the 2 sets of 23 chromosomes come from?

20: What is a cell called when it contains two sets of chromosomes?

21: How is a gamete cell different than a diploid?

22: What is it called when two haploid cells fuse? What is the process called of them fusing?

23: Is the number of chromosomes the same in all species?

24: Of the 23 pairs of chromosomes; how many pairs are autosomes? How many are the sex chromosomes?

25: Why is the sex/gender of an offspring determined by the chromosomes donated by the male?

26: What is a karotype?

27: What happens when an individual is born with an extra copy of chromosome 21?

28: Why is there greater risk for birth defects as a mother is older in age?

29: How can doctors check for possible birth defects in prenatal testing?