When the chromosomes of closely related species are compared, a. the banding patterns are often similar. b. a few structural alterations may be seen. c. a change in chromosome number may be seen. d. all of the above are commonly observed.

What kind of chromosome rearrangement (shown as ?) is represented below? a. insertion b. Pericentric inversion c. Robersonian translocation d. Paracentric inversion e. balanced translocation

Which of the following statements is false?   A. Humans have 1 pair of sex chromosomes   B. Humans have 46 chromosomes   C. Sex chromosomes are considered a homologous pair   D. Humans have 23 pairs of chromosomes   E. Humans have 22 autosomes

One of the following is most suitable for study of mutations: A. Haploids B. Diploids C. Tetraploids D. Polyploid

A mechanism that may cause a translocation isa. the joining of reactive ends when two different chromosomesbreak.b. crossing over between nonhomologous chromosomes.c. crossing over between homologous chromosomes.d. either a or b.

Which of the following evolutionary changes is an illustration of horizontal gene transfer? the human point mutation which changes a T into an A in the sickle-cell b-globin gene B. origin of the tetraploid potato (Solanum tuberosum) from its diploid ancestor (Solanum stenotomum) non-disjunction of the duplicated human chromosome 21, causing Down’s syndrome D. the green sea slug acquiring the genes for making chlorophyll from the chloroplasts of green algae the single gene deletion which can reduce the variety of mating types in yeast

Because of recombination: a. new alleles are created. b. haplotypes shorten with each generation. c. genetic diversity is decreased. d. female and male phenotypes differ. e. None of the above is correct

Pea plants have seven different types of chromosomes. A chromosome with a centromere at the very end is called   a. submetacentric.   b. acentric.   c. acrocentric.   d. metacentric.   e. telocentric.

Which of the following statements are true regarding homologous pairs of chromosomes? Select all that apply. A. They are the same size B. Their prescence indicates a cell is a diploid C. They are identical copies of one another D. One of the homologous chromosomes in a set is synthesized during S phase E. They line up next to each other during metaphase I of meiosis F. They are separated in anaphase I of meiosis

1. Construct a map of a chromosome containing 4 genes. Some of the distances between these genes are listed below. The distance between genes R and C is 10 units The distance between genes C and P is 13 units The distance between genes P and R is 3 units The distance between genes S and C is 18 units The distance between genes S and R is 8 units SPRC D. What two genes would likely have the most recombination events between them? S and C P and R E. What two genes would likely have the fewest recombination events between them? F. How many units are between S and P?