Cystic Fibrosis (CF) is a genetic disorder that results in an abnormal cellular
ID: 259909 • Letter: C
Question
Cystic Fibrosis (CF) is a genetic disorder that results in an abnormal cellular chloride channels due to a defective protein structure. What would be the first step if you wanted to determine whethe the gene for this protein exists in other species? Select one: O a. Clone the mutated CF gene b. Clone the normal CF gene. O c. Sequence the mutated CF gene. O d. Sequence the normal CF gene Select the correct statement regarding the process of meiosis: Select one: a. Meosis produces haploid somatic cells. b. Certain somatic cells can undergo melosis only after mitosis has occurred O c. Reductive division in humans refers to the reduction of the number of chromosomes from 92 to 46 d. Only the gametes, or sex cells, undergo meiosis. Crossing an individual who is homozygous dominant for a trait with an individual whose genotype is unknown will most likely produce which set of offspring? Select one: 0 a. 100% dominant phenotype 0 b, 75% dominant phenotype, 25% recessive phenotype O c. 50% dominant phenotype, 50% recessive phenotype O d. 100% dominant genotype The allele tor brown eyes is dominant over the allele tor blue eyes. Two parents with brown eyes have a child with blue eyes. What must be true ot the parents? Select one: O a. Both parents are homozygous dominant tor eye color. b. Both parents are homozygous recessive for eye color. c.One parent is heterozygous and the other is homozygous tor eye color d. Both parents are heterozygous for eye color.Explanation / Answer
1. Cystic Fibrosis- (C) We need to sequence the mutated gene first by that only we can compare it with other species and get an idea whether it is present in other species or not.
2. (D) Only the gametes and sexual cells undergo meiosis.
3. (A) 100 % dominent phenotype
4. (D) Bothe parents are heterozygous for eye color. Lets say brown color (BB) and blue eye color (bb), So if parents are homozygous then children would be with brown eyes only but if parents are heterozygous (Bb), then their children can have blue eyes (bb).
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