Genes worksheet

________________________________ are the structures in the nucleus of a cell that contain hereditary information.
2. A chromosome is best described as ________________________________________________________________________________
3. DNA is passed to offspring through
4. Genes are made up of
(circle one)
(circle one)
5. A section of a chromosome that contains specific hereditary information is called a
A. vacuole
B. gene
C. cell membrane
D. hormone
6. Write the following words to show the most complex structure to the least complex structure:
________________________________, _____________________________, ___________________________
Most complex
least complex
7. In humans, eye color can be determined by pairs of
A. organs
B. sibling
C. genes
D. cells
8. Which of the following would be contained in a pair of chromosomes?
A. specific genes B. egg cells
C. sperm cells
D. hormones
9. The diagram shows two paired homologous chromosomes. What do R and r represent?
A. two different forms of a gene
C. two identical genes
B. two gametes that can form a zygote
D. two chromosomes in a hybrid pea plant
10. To find out who the biological parents are, adopted children sometimes request DNA tests. These tests involve
comparing DNA samples from the child to DNA samples taken from the parents. Possible relationships may be
determined from these tests because
A. the base sequence of the father determines the base sequence of the offspring
B. the DNA of parents and their offspring is more similar than the DNA of nonfamily members
C. the position of the genes on each chromosome is unique to each family
D. the mutation rate is the same in closely related individuals
11. Which statement is true about every human cell?
A. Every human cell contains a copy of all the information needed to make a human being.
B. Every human cell functions in the same way.
C. Every human cell has the same structure.
D. Every human cell contains one pair of genes.
12. Why is it important that genes match up on a pair of homologous chromosomes? _______________________________________
13. What are some examples of traits that genes code for? ________________________________, ___________________ ________________
______________________________________,________________________________, ______________________________________________________________
14. I have freckles but my sister does not. If we have the same mom (has no freckles) and same dad (has freckles), how
do you think this is possible? ________________________________________________________________________________________________________
15. Describe one trait you know you got from one of your parents. What is the trait, and from which parent did you
inherit it? _____________________________________________________________________________________________________________________________