Chap 14 Outline - CHAPTER 14 - MENDEL AND THE GENE IDEA...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CHAPTER 14 - MENDEL AND THE GENE IDEA Objectives 1. List several features of Mendel’s methods that contributed to his success. 2. State, in their own words, Mendel’s law of segregation. 3. Use a Punnett square to predict the results of a monohybrid cross and state the phenotypic and genotypic ratios of the F 2 generation. 4. Distinguish between genotype & phenotype; heterozygous & homozygous; 5. Explain how a testcross is used to determine if a dominant phenotype is homo or heterozygous. 6. Explain the random events of allele segregation during meiosis and fusion of gametes. 7. State, in their own words, Mendel’s law of independent assortment. 8. Use a Punnett square to predict the results of a dihybrid cross and state the phenotypic and genotypic ratios of the F 2 generation. 9. Give an example of incomplete dominance. 10. Explain how the phenotypic expression of the heterozygote is affected by complete dominance, incomplete dominance and codominance. 11. Describe the inheritance of the ABO blood system and explain why the A and B alleles are said to be codominant. 12. Define and give examples of pleiotropy. 13. Explain, in your own words, what is meant by “one gene is epistatic to another.” 14. Explain how epistasis affects the phenotypic ratio for a dihybrid cross. 15. Describe polygenic inheritance. 16. Describe how environmental conditions can influence the phenotypic expression of a character. 17. Given a simple family pedigree, deduce the genotypes for some of the family members. 18. Describe the inheritance of cystic fibrosis, Tay-Sachs disease, and sickle-cell disease. 19. Explain how a lethal recessive gene can be maintained in a population. 20. Explain why consanguinity increases the probability of homozygosity in offspring. 21. Explain why lethal dominant genes are rarer than lethal recessive genes. 22. Name a late-acting lethal dominant in humans and explain how it can escape elimination. 23. Explain how carrier recognition, fetal testing and newborn screening can be used in genetic screening and counseling. Key words Allele amniocentesis carrier character chorionic villus sampling (CVS) codominance complete dominance cystic fibrosis dihybrid dominant allele epistasis F1 generation F2 generation genotype heterozygous homozygous Huntington’s disease hybridization incomplete dominance law of independent assortment law of segregation monohybrid multifactorial P generation pedigree phenotype pleiotropy polygenic inheritance
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/14/2011 for the course BIOL 2301 taught by Professor Staff during the Spring '11 term at Lone Star College System.

Page1 / 5

Chap 14 Outline - CHAPTER 14 - MENDEL AND THE GENE IDEA...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online