Overview
Worksheet_Patterns of Inheritance
lab https://www.youtube.com/watch?v=YtWVeuNeMyg
Name:
General and Critical Thinking Questions (Answer the questions based on the video you watched in this lab):
1. What is Genetics?
2. What was used in this lab instead of pea plant?
3. What are three discoveries Gregor Mendel made about genetics?
4. What does DNA contain? Explain.
5. A molecule of DNA is called____________________.
6. How many sets of chromosomes do the DNA of many organisms including plants contain?
7. What isa chromosome pair?
8. The portion of a chromosome containing the code for a particular physical trait is a(n) ___________.
9. Each matching gene with a chromosome pair is a(n)___________.
10. What is the physical trait that was examined in this virtual lab?
11. What is biological inheritance? Explain.
12. What is genotype? Explain.
13. What is phenotype? Explain.
14. When does Brassica rapa express the trait for the purple stem? Explain.
15. When does Brassica rapa express the trait for thegreenstem? Explain.
16. What is a dominant allele? Explain.
17. What is a recessive allele? Explain.
18. What is the principle of dominance? Explain.
19. How can a recessive trait be expressed in an organism?Explain.
20. The male part of the flower is the____________.At the top of it is a(n)_____________, which contains the _____________.
21. The female part of the flower is the____________.At the top of it is a sticky pad called a(n)_____________.
22. What is a Punnett square? Explain.
23. An uppercase letter is assigned to the____________ alleleand a lowercase letter is assigned to the____________ allele.
24. A ____________ is a group of offspring resulting from a controlled genetics experiment.
25. Why should each first generation plant have a purple stem? Explain.
26. There are seedlings that are the offspring (the second generation) of a cross between heterozygous parents (the first generation): the cross Pp × Pp. Based on the law of segregation and the principle of dominance, complete the Punnett square to determine the expected phenotypic ratio.
Parents | ♂ Pp | ♀ Pp |
P | p | |
P | ||
p |
27. What is the expected phenotypic ratio?