3. (8 points). If you discover two mutants for flower color in plants, how can y

Question

3. (8 points). If you discover two mutants for flower color in plants, how can you determine if they involve the same gene or different genes? 4. (12 points). In bunny rabbi A B gray; A third gene (C) creating albinos determines whether the color is deposited in the coat. The mutant gene prevents deposition and is recessive. Show the genotypes of the offspring below and predict the genotype and phenotype of the parents who produced them. a) 3/8 black: 3/8 gray: 2/8 albino ts, the following genotypes of two independent genes determine coat color. A bb cream, aaB black; aabb- yellow b) 1/8 gray; 1/8 black: 1/8 cream: 1/8 yellow: 4/8 albino

Explanation / Answer

3: Complementation test determines if the two mutants are of the same gene or belong to the different ones. A gene regulate the production of a particular active enzyme. Its mutant allele regulates the production of the inactive form of that enzyme i.e. mutant phenotype.

Cis heterozygote has wild type alleles on one of the two homologous chromosomes. Presence of wild type allele ensure the production of active enzyme and there is expression of wild type phenotype. Expression of mutant phenotype by trans heterozygote shows that the two mutants belong to the same gene since it will produce inactive enzyme and mutant phenotype will be expressed. If the two mutants belong to two separate genes, one chromosome of the trans heterozygous will carry the wild type allele of the other gene and there will be expression of wild type phenotype.

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.