The Fly a) Bristles: Describe the wild-type phenotype and list the 5 phenotypes that are different from the wild type. b) The phenotype, you can see the abbreviation for each type. The + indicates wild-type: What are the abbreviations for wing shape? c) Compare antennae types: How is "aristapedia" different from wild-type?

What is the role of Agrobacterium tumefaciens in the production of transgenic plants? a. Genes from A. fume fociens are inserted into plant DNA to give the plant different traits. b. Transgenic plants have been given resistance to the pest A. tumefacaens. c. A. wmefaciens is used as a vector to move genes into plant cells. d. Plant genes are incorporated into the genome of Agrobacterium tumefaciens.

In the following diagram, designate each daughter cell as diploid (2n) or haploid (n).

Figure 11.9 If a mutation occurs so that a fungus is no longer able to produce a minus mating type, will it still be able to reproduce?

Figure 7.2 If a mutation occurs so that a fungus is no longer able to produce a minus mating type, will it still be able to reproduce? Figure 7.2 (a) In animals, sexually reproducing adults form haploid gametes from diploid germ cells. (b) Fungi, such as black bread mold (Rhizopus nigricans), have haploid-dominant life cycles. (c) Plants have a life cycle that alternates between a multicellular haploid organism and a multicellular diploid organism. (credit c fern: modification of work by Cory Zanker; credit c gametophyte: modification of work by Vlmastra/Wikimedia Commons)

VISUALIZE Use two different colors to depict the unduplicated chromosomes of species C with larger chromosomes (2n = 8) and species D with slightly smaller chromosomes (2n = 10), and of their F1 hybrid. Is the hybrid likely to be fertile?

Figure 17.8 Do you think Dolly was a Finn-Dorset or a Scottish Blackface sheep?

The chromosome number ________ . a. refers to a particular chromosome in a cell b. is a characteristic feature of a species c. is the number of autosomes in cells of a given type d. is the same in all species

The photos below show flowers from two Arabidopsis plants. One plant is wild-type unmutated; the other carries a mutation in one of its ABC floral identity genes. This mutation causes sepals and petals to form instead of stamens and carpels. Refer to Figure 10.7 to decide which gene A, B, or C has been inactivated by the mutation.

The cystic fibrosis gene encodes a chloride channel protein necessary for normal cellular functions. Let us assume that if at least 5% normal channels are present, the affected individual has mild symptoms of cystic fibrosis. Having less than 5% normal channels produces severe symptoms. At least 50% of the channels must be expressed for the individual to be phenotypically normal. This gene has various mutant recessive alleles: Predict the percent of functional channels and severity of symptoms for the following genotypes: a. heterozygous for CF100 b. homozygous for CF100 c. heterozygous, with one copy of CF100 and one of CF3 d. heterozygous, with one copy of CF1 and one copy of CF3