Which of the following is false?   a. The color of a fruit fly's eyes is a trait.   b. The instructions for producing a trait are found in a gene that controls the physical expression of that trait.   c. A gene can have different alleles that can specify different traits, such as red or brown eye color.   d. The trait is influenced by the gene, independent of the environment.   e. By studying the patterns of traits over generations of an organism, the genetic composition of an organism can be deduced.

Molecular geneticists have performed experiments in which they altered the number of copies of the bicoid gene in flies, affecting the amount of Bicoid protein produced. a. What would be the effect on development of an increased number of copies of the bicoid gene? b. What would be the effect of a decreased number of copies of bicoid? Justify your answers.

Nancy Jones is a doctor who specializes in genetic diseases. For many years she has been studying populations of people who have Huntington’s disease. Dr. Jones has a special interest in Huntington’s disease because her mother died of this disease after many years living in a wheelchair. Dr. Jones’s father does not appear to have the disease. She has developed a test that can detect the dominant Huntington’s gene before symptoms appear and she has performed this test on many people. This test involves mapping a person’s genome to determine if the dominant Huntington’s gene is present. Dr. Jones is unsure if she should take the test herself as it will not prevent the disease from developing, only give the person advanced warning of the disease. Nancy Jones has a sister. Draw a pedigree chart that maps the disease through this family. Make sure to indicate those family members that have the disease, those that do not have the disease and those whose status is unknown.  If you were Nancy…

Which of the following is the best analogy for molecular genetics' view of human development? Select one: a. an energy bar Incorrect b. a buffet table c. a take-out box d. a food truck

Are gene mutations caused by selective pressures in the environment? In other words, do gene mutations arise in an organism out of need or want? Group of answer choices A. No, because gene mutations are not purely random. B. Yes, because gene mutations are not purely random. C. No, because gene mutations are purely random. D. Yes, because gene mutations are purely random.

The hairless gene allele, H, in fruit flies, causes fruit flies to lack sensory hairs.  The H allele is dominant; the recessive allele, h, causes flies to have normal sensory hairs.  The dominant allele is lethal when homozygous. A second gene, suppressor of Hairless, Su(H), can block the phenotype of hairless. The dominant allele, Su(H), prevents the H allele from causing its phenotype, resulting in flies with sensory hairs.  The dominant Su(H) allele is also lethal when homozygous. The recessive allele, su(H), allows the H allele to cause its phenotype.  The Su(H) allele does not affect with the h allele. If you crossed a normal hair fly (of genotype H h Su(H) su(H) ) with another normal hair fly (of genotype H h Su(H) su(H) ), what proportions  or ratios of genotypes and phenotypes would you expect to observe in the offspring? Show your work.