1. Review Questions
Genetics

2. Question 1 An organism’s physical appearance is known as its:
genotype
heterozygous
phenotype
homozygous

3. CORRECT!
Next Question…

4. INCORRECT
Try again…

5. Question 2 If a homozygous tall plant (TT) is crossed with a homozygous short plant (tt). What is the probability that the offspring with be tall?
25%
75%
50%
100%

6. CORRECT!
Next Question…

7. INCORRECT
Try again…

8. Question 3 What is a mutation?
Any change that is harmful to an organism
Any change in a gene or chromosome
Any change that his helpful to an organism
Any change in the phenotype of a cell

9. CORRECT!
Next Question…

10. INCORRECT
Try again…

11. Question 4 What are genes?
A type of cotton pants
The factors that control traits
The splitting of cells
When both alleles are dominant.

12. CORRECT!
Next Question…

13. INCORRECT
Try again…

14. Question 5 What is the difference between heterozygous and homozygous?
Heterozygous has 2 different alleles and Homozygous has 2 of the same alleles.
Homozygous has 2 different alleles and Heterozygous has 2 of the same alleles.
Heterozygous means physical characteristics and Homozygous means genetic makeup.
They mean the same thing.

15. CORRECT!
Next Question…

16. INCORRECT
Try again…

17. Question 6 What is a segment of DNA on a chromosome?
phenotype
alleles
genes
genotype

18. CORRECT!
Next Question…

19. INCORRECT
Try again…

20. Question 7 What is genotype?
The physical appearance of someone
An organisms genetic makeup
A form of mutation
A type of protein

21. CORRECT!
Next Question…

22. INCORRECT
Try again…

23. Question 8 What is the different form of a gene?
Co-dominant
Meiosis
Mutation
Allele

24. CORRECT!
Next Question…

25. INCORRECT
Try again…

26. Question 9 What is a phenotype?
When an organism has 2 of the same alleles.
An organism’s genetic makeup
An organism’s physical appearance or visible traits.
When an organism has 2 different alleles.

27. CORRECT!
Next Question…

28. INCORRECT
Try again…

29. Question 10 What does the Chromosome Theory of Inheritance state?
Genes are carried from parents to offspring on chromosomes.
Co-dominant genes combine to form new hybrids
Chromosomes are carried from parents to offspring on hybrids
Hybrid pairs of chromosomes combine to form offspring.

30. CORRECT!
Next Question…

31. INCORRECT
Try again…

32. Question 11 What happens in Meiosis?
Chromosomes stay together to form new sex cells.
Chromosomes separate to form sex cells
Each sex cell loses half of its chromosomes
Each sex cell copies its DNA to form 4 identical cells.

33. CORRECT!
Next Question…

34. INCORRECT
Try again…

35. You have completed the review questions.