BSC 1005 - Midterm Exam || with Complete Solutions.

Which of the following is a true statement about a human zygote? correct answers This diploid cell contains all of the genetic information for the individual it will become. Which of the following sets of statements is true of a homologous pair of chromosomes? correct answers They have the same genes but unique alleles. One member of the pair is inherited from each parent. Can the expression of highly heritable traits, such as maze-running ability in rats, be influenced by environment? Why or why not? correct answers Yes because transcription regulators are subject to environmental influences. Which of the following is an example of a trait that can be influenced by both genes and the environment? correct answers Skin color Random fertilization refers to which of the following? correct answers Gametes combine randomly regardless of the alleles they carry. The separation of pairs of alleles that lie on homologous chromosomes during meiosis is called __________. correct answers Segregation A male carrier for a recessive disease is __________. correct answers Heterozygous for the disease-causing allele Which of the following best summarizes the difference between qualitative and quantitative genetics? correct answers Qualitative genetics views traits as "all or none," whereas quantitative genetics views traits along a continuum. A monohybrid cross between two plants with genotype AA and Aa for one characteristic can produce all of the following combinations except _________. correct answers aa A study showed that the heights of fathers and their biological sons are strongly correlated in every population studied. Knowing this, you can say which of the following? correct answers Height is highly heritable According to the principle of segregation, the gametes of a heterozygous individual will contain __________ for the trait of interest. correct answers 50% dominant and 50% recessive alleles A Punnett square is a 4 x 4 table with two letters as column headings and two letters as row headings. What do these letters represent? What do the letters inside the squares represent? correct answers Possible parental alleles for the gene of interest; all possible genotypes from a mating (cross) between the parents.