Genetic drift Study guides, Class notes & Summaries

What is the haploid number of chromosomes for humans? - 23 Mitosis - Prophase, metaphase, anaphase, telophase What are the parts of the cell (plasma) membrane? - Phospholipid, protein, and carbohydrate What stage of the cell cycle does DNA replication occur? - S Phase Endocytosis - Cell membrane surrounds a molecule (like a protein) and forms a vesicle around the molecule which is brought inside the cell Cell - Smallest identifiable unit capable of carrying on th...

McMaster Bio 1M03: Exam 2024/2025 Questions with all the correct Answers (Real Actual Exam). Why might Pasteur's experiment be inconclusive? - ANS - The swan-necked flask broth may not support cell growth, or the broth was poisoned. Experiment did not confirm hypothesis that all cells come from pre-existing cells Why are replicates important in experiments? - ANS - To ensure that results were not achieved by random chance What is the definition of a replicate? - ANS - Unit that shares a c...

What requirements must be met in order for natural selection to occur? Think of traits. a. Variable and responsive to environmental changes b. Beneficial and heritable c. Heritable and adaptive d. Adaptive and allow for acclimatization correct answers B What is the ultimate source of genetic variation in a population? a. Natural selection b. Mutation c. Migration d. Drift e. Reproduction correct answers B Which of the following scenarios is an example of genetic ...

Natural Selection is: CORRECT ANSWER a process leading to differential reproductive successes among members of a population Cactus-like plants adapted for desert or dry environments are succulent (have fleshy, juicy stems) and have spines (modified leaves). Succulents can be found to occur around the world, but are classified into a number of very different families of plants based on other characteristics. That so many different kinds of succulents exist is an example of: CORRECT ANSWER conv...

Chapter 04 Genetics of Cellular Function Answer Key True / False Questions 1. Naked DNA is called chromatin. FALSE Accessibility: Keyboard Navigation Blooms Level: 1. Remember Gradable: automatic HAPS Objective: C12.04 Analyze the interrelationships among chromatin, chromosomes and chromatids. HAPS Topic: Module C12 Somatic cell division. Learning Outcome: 04.01b Explain how DNA and proteins are organized to form the chromosomes. Section: 04.01 Topic: Nucleic acids: DNA and RNA 2. DNA is ...

D ≈ 0.49 A population of butterflies comes in three color morphs; orange (A1A1), black (A2A2), or orange with black spots (A1A2). You find that the frequency of orange butterflies is 0.49, and the frequency of black butterflies is 0.36. You do not know if the population is currently in HWE. What would you expect the frequency of spotted butterflies to be, if the population is under Hardy-Weinberg equilibrium? A ≈ 0.42 B ≈ 0.15 C ≈ 0.84 D ≈ 0.49 B. Migration is low and the populat...

McMaster Bio 1M03: Exam 2024/2025 Questions with all the correct Answers (Real Actual Exam). Why might Pasteur's experiment be inconclusive? - ANS - The swan-necked flask broth may not support cell growth, or the broth was poisoned. Experiment did not confirm hypothesis that all cells come from pre-existing cells Why are replicates important in experiments? - ANS - To ensure that results were not achieved by random chance What is the definition of a replicate? - ANS - Unit that shares a c...

A thin-shelled crab can more readily move to escape a predator than can a thick-shelled crab, but it is more vulnerable to predators that drill through the shell. Because of these opposing forces, shell thickness for many types of crabs has remained within a narrow range over a long time. This would be an example of _____________________________ selection correct answer: stabilizing What is genetic change in a population over time? correct answer: evolution What is the mode of natural...

Why might Pasteur's experiment be inconclusive? - The swan-necked flask broth may not support cell growth, or the broth was poisoned. Experiment did not confirm hypothesis that all cells come from pre-existing cells Why are replicates important in experiments? - To ensure that results were not achieved by random chance What is the definition of a replicate? - Unit that shares a common thing (4 mice in one cage = 1 replicate) What does the law of succession suggest? - As one species disap...

Which of the following is not an observation or inference on which natural selection is based? a. There is heritable variation among individuals. b. Poorly adapted individuals never produce offspring. c. Species produce more offspring than the environment can support. d. Individuals whose characteristics are best suited to the environment generally leave more offspring than those whose characteristics are less well suited. e. Only a fraction of an individual's offspring may survive. - b. P...