PLEASE HELP ASAPPPPP

In this activity, you will apply what you have learned in the lesson. Please answer the questions below. Submit this worksheet to your teacher when you are done.

1. Describe how genetic material is distributed via reproductive processes.

a. In terms of alleles, how is the result of sexual reproduction different from the result of asexual reproduction? (1 point)






b. Why do most organisms that reproduce sexually contain an even number of chromosomes? Hint: Think about the chromosomes contained in diploid cells. (1 point)






c. A cucumber plant has 14 chromosomes in each of its somatic cells. Describe how meiosis leads to a reduced number of chromosomes in a cucumber plant's gametes. How many chromosomes does a cucumber gamete contain? (2 points)






2. Describe sources of genetic variation in offspring.

a. How does independent assortment produce genetic variation in offspring? Hint: Think about how chromosomes line up. (2 points)






b. How does the number of chromosomes in an organism affect the number of possible combinations resulting from independent assortment? (1 point)






c. Describe what occurs during crossing over and how it produces genetic variation. Draw a model to support your answer. Your model should include two chromosomes — one with the alleles A, E, and G, and the other with the alleles a, e, and g. (4 points)





















3. Consider how the processes of meiosis, fertilization, and growth produce offspring via sexual reproduction.

a. Where does the genetic material that forms a zygote come from? (1 point)






b. How does the number of chromosomes in an offspring compare with the number of chromosomes in each parent? Explain. (1 point)






c. How does fertilization produce genetic variation between parents and offspring? (1 point)






d. If parents produce multiple offspring, how are the siblings likely to compare with one another genetically? Why? Include the roles of DNA replication, independent assortment, and crossing over in your explanation. (3 points)











e. A zygote undergoes mitotic cell division to produce all of the other cells in the offspring. Explain why DNA replication and mitosis result in little to no genetic variation among these cells. (2 points)







4. Develop a model to compare mitosis and meiosis.

a. This model shows the basic changes in a cell as it undergoes mitosis. Draw a similar model that shows how a cell changes as it undergoes meiosis. (4 points)

















b. How does the DNA of the daughter cells in your model compare with the DNA of the parent cell? (2 points)