IB Biology Genetics
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This document provides a summary of key concepts in genetics and heredity: 1. It defines key terms like DNA, genes, alleles, chromosomes, and mutations. It explains genetic disorders like sickle cell anemia which result from mutations. 2. It describes Mendel's experiments with pea plants and his formulation of the laws of segregation and independent assortment. These laws explain inheritance patterns. 3. It discusses meiosis and how it produces genetic variation through independent assortment of chromosomes and crossing over. Meiosis also determines an organism's sex through sex chromosomes.
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- His experiments demonstrated that genetic factors (now known as genes) are transmitted from parents to offspring in discrete units (now known as alleles) that assort independently of each other during gamete formation and fertilization.
- Monohybrid crosses examine a single trait while dihybrid crosses examine the inheritance of two traits simultaneously, following predictable 3:1 and
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Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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Training: ISO/IEC 27001 Information Security Management System - EN | PECB
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Any substance (other than food) that is used to prevent, diagnose, treat, or relieve symptoms of a
disease or abnormal condition
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IB Biology Genetics
- 1. Genetics
- 15. Amniocentesis
- 17. A Side by Side Comparison
- 26. Crossover Results A genotype HE B genotype He C genotype hE D genotype he Start A genotype HE B genotype HE C genotype he D genotype he Crossover B and C become recombinants A B C D H E h e A B C D H E h e A B C D H E h e
- 35. Gregor Mendel’s Findings Dwarf Tall Length of stem 7. Terminal Axial Position of flowers 6. Yellow Green Color of unripe pods 5. Constricted Inflated Form of ripe pods 4. White Grey Color of seed coat 3. Green Yellow Color of seed albumen 2. Wrinkled Smooth Form of ripe seed 1. Recessive Expression Dominant Expression Trait
- 53. Dihybrid crosses Parent genotypes: SsYy x SsYy -S=smooth s=wrinkled -Y=Yellow y=green Possible allele combos from one parent ssyy ssYy Ssyy SsYy sy ssYy ssYY SsYy SsYY sY Ssyy SsYy SSyy SSYy Sy SsYy SsYY SSYy SSYY SY sy sY Sy SY
- 54. Possible ratios for SsYy x SsYy F1 Genotypic ratios 1:SSYY 2:SSYy 1:SSyy 2:SsYY 4:SsYy 2:Ssyy 1:ssYY 2:ssYy 1:ssyy F1 Phenotypic ratios 9: smooth-yellow 3:smooth-green 3: wrinkled-yellow 1: wrinkled-green ssyy ssYy Ssyy SsYy sy ssYy ssYY SsYy SsYY sY Ssyy SsYy SSyy SSYy Sy SsYy SsYY SSYy SSYY SY sy sY Sy SY
- 62. Gene linkage in Drosophila
- 68. P: A P A P B P B P x A W A W B W B W F1: A P A W B P B W A W B W A W B W A W B W A W B W A P B P A P B P A P B P A P B P
- 69. F1: A P A W B P B W x A P A W B P B W F2: See Punnett square (fill it in) Determine which ones are white, purple and intermediates.) A W B W A W B P A P B W A P B P A W B W A W B P A P B W A P B P