b11 midterm

10 Pages
Unlock Document

University of Toronto Scarborough
Biological Sciences
Shelley A.Brunt

1 BGYB11 Midterm 1 1. Mendels law of independent assortment states that segregation of an allelic pair for one trait had no effect on the segregation of alleles for another trait. 2. How many chromosomes would a sexually reproducing organism with 6 chromosomes in generation 1 have in generation 4 if the normal reductional division takes place in meiosis? 4 3. If pollen from a plant that is hetero for a mutant allele is used to fertilize another plant that is null for the allele, what is the expected ratio of progeny? half offspring are heterozygotes 4. If primary non-disjunction occurs at spermatogenesis: half gametes have an extra chromosome 5. During the first meiotic division, HOMOLOGS segregate one another, second meiotic division, the SISTER CHROMATIDS segregate from one another. 6. Consider a single autosome (e.g. chromosome 4) that you have. Which statement is always true? a. I received more of chromosome 4 DNA from my maternal grandparents than my paternal grandparents b. I received 25% of my chromosome 4 DNA from each of my grandparents c. I received either 0% or 50% of my chromosome 4 DNA from my paternal grandfather d. I received either 50% or 100% of my chromosome 4 DNA from my maternal grandfather e. None of the above 7. Suppose that you had two solutionns of DNA, one single stranded (ssDNA) and the other double stranded (dsDNA). You take some of each and determine that UV light absorption by the single stranded sample is 50% greater than that of the double stranded sample. What does this tell you about the relative concentrations of DNA in the original samples? a. the ssDNA is 0.5 times more concentrated than the dsDNA b. the ssDNA is 2 times as concentrated as the dsDNA c. the dsDNA is 0.5 times more concentrated than the ssDNA d. the dsDNA is 2 times as concentrated as the ssDNA e. the two samples have the same concentration 8. Consider two organisms with genomes of equal size. The GC content of the first is 40% while that of the second is 33%. Which of the following statements is true? a. the melting temperature of genome 1 is lower than that of genome 2 b. the melting temperature of genome 2 is lower than that of genome 1 c. the complexity of genome 1 is greater than that of genome 2 d. both a and c e. both b and c 9. Based on Chargaffs observations on base composition of DNA, which of the following mathematical statements are true of every double stranded DNA sample? www.notesolution.com
More Less

Related notes for BIOB11H3

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.