Genetics and Evolution
Topics
- Mendelian inheritance
- Deviations: incomplete dominance, co-dominance, multiple alleles, blood groups, pleiotropy, polygenic inheritance
- Chromosome theory, linkage and crossing over
- Sex determination: humans, birds, honey bee
- Sex-linked inheritance, Mendelian and chromosomal disorders
- DNA as genetic material, DNA and RNA structure, DNA packaging
- DNA replication and central dogma
- Transcription, genetic code, translation, protein biosynthesis
- Gene regulation: lac operon
- Human genome project and DNA fingerprinting
Chapter tests
See all →Top questions
See all →- Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true? Answer: 2. They are fraternal twins. Key idea: Monozygotic twins come from one zygote and have the same sex. A boy and a girl have different... 1
- Who proposed that the genetic code for amino acids should be made up of three nucleotides? Answer: 1. George Gamow Key idea: The triplet nature of the genetic code was first theorised by the physicist George Gamow. Since 20 amino a... 1
- Which factor is important for termination of transcription? Answer: 3. ρ (rho) Key idea: In bacteria, the sigma factor starts transcription and the rho (ρ) factor terminates it. Alpha is a subunit of... 1
- Match List I with List II :List-I: A. Alfred Hershey and Martha Chase; B. Euchromatin; C. Frederick Griffith; D. HeterochromatinList-II: I. Streptococcus pneumoniae; II. Densely packed and dark-stained; III. Loosely packed and light-stained; IV. DNA… Answer: 3. A-IV, B-III, C-I, D-II Hershey and Chase: confirmed DNA as genetic material (IV) Euchromatin: loosely packed, light-stained (III)... 1
- Histones are enriched with - Answer: 1. Lysine & Arginine Key idea: Histones are basic proteins that bind the acidic, negatively charged DNA. They are rich in the positi... 1
- Genes R and Y follow independent assortment. If RRYY produce round yellow seeds and rryy produce wrinkled green seeds, what will be the phenotypic ratio of the F2 generation? Answer: 3. Phenotypic ratio - 9 : 3 : 3 : 1 Key idea: This is a standard dihybrid cross. RRYY x rryy gives F1 RrYy (all round yellow). Selfi... 1