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A true-breeding tall, purple-flowered pea plant was crossed to a true-breeding short, white-flowered pea plant. The F1 generation consisted of all tall, purple-flowered plants. Using this information, answer the following in the text box below: Are there one or two characters being studied in this cross (list the character(s) and the traits associated, 1pt)? Assign letters for the alleles carried by the parental generation plants (be sure to indicate dominant and recessive and the phenotype associated with each letter, 1pt). Using the letters you assigned, give the genotypes of the parents and of the F1 generation. Then, give the gametes that will be formed from the F1 generation (1 pt). Explain: how are Mendel’s two laws demonstrated by this cross (2pts)?

The genetic content of a cell is 3n = 21. What is n equal to?

Continuing from the last question (pedigree is the same): The question mark on the pedigree below indicates a third child the couple is expecting. Calculate the probability that the child will be a girl and have the condition (hint: use the scratch paper and write out the likely genotypes of the parents to help).

Prokaryotes divide by __________________, which is a type of ______________ reproduction.

Colorblindness is an X-linked recessive trait in humans. Consider a mother who is a carrier of this trait and a normal father.  Which of the following combinations shows the correct genotype for the mother and father in this scenario? A.  XAXa, XaY   B. XAXa, XAY   C. XAXA, XaY   D. XAXA, XAY  

A true-breeding tall, purple-flowered pea plant was crossed to a true-breeding short, white-flowered pea plant. The F1 generation consisted of all tall, purple-flowered plants. Using this information, answer the following in the text box below: Are there one or two characters being studied in this cross (list the character(s) and the traits associated, 1pt)? Assign letters for the alleles carried by the parental generation plants (be sure to indicate dominant and recessive and the phenotype associated with each letter, 1pt). Using the letters you assigned, give the genotypes of the parents and of the F1 generation. Then, give the gametes that will be formed from the F1 generation (1 pt). Explain: how are Mendel’s two laws demonstrated by this cross (2pts)?

Which of the following life cycles is common in plants and features multicellular stages that alternate between haploid and diploid?

For this question, please draw clearly on your scratch paper. Your answer should be easy to find and read on the scan/photo. Remember to submit your scratch paper after the exam to the “Submit your scratch paper from Exam 4 here” assignment within 5 minutes of when you submit the exam. Examine the figure below. According to the law of independent assortment, with the tetrads in this position, answer the following questions: a. Draw what each of the daughter cells will look like by the end of this process, make sure you indicate which alleles are present in each daughter cell (3pts). b. What is the genetic content of the starting cell? What is the genetic content of the daughter cells (1pt)? c. Is this the only possible arrangement of the chromosomes in the starting cell? Briefly explain why or why not (1pt, you may type this answer (answer c only) in the text box below if you wish).  

A relatively new, experimental procedure for the destruction of cancer cells is called Boron Neutron Capture Therapy. Boron-10, a non-radioactive isotope, concentrates within cancerous tumors. The patient is then irradiated with neutrons, which are absorbed by the boron to produce high energy alpha particle radiation which can target and destroy the cancerous cells of the tumor. How many protons, electrons and neutrons would an atom of the isotope B-10 have?

Carry out the following calculation and report the answer using the proper number of significant figures: 38.251 × 73.1