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Transcript
Do You Know… Genetics Click here to continue Do You Know… Genetics 1. A characteristic that an organism can pass on to its offspring through its genes is ---. a. alleles b. genes c. traits 2. A segment of DNA on a chromosome that codes for a specific trait is called ---. a. a gene b. an allele c. heredity Tutorial Click here to continue Do You Know… Genetics 3. The passing of traits from parents to offspring is called ---. a. heredity b. genetics c. Punnett Square 4. The likelihood of a particular event occurring is called ---. a. chance b. probability c. heredity Tutorial Click here to continue Do You Know… Genetics 5. An allele whose traits always show up in the organism when the allele is present is ---. a. dominant b. recessive c. codominant 6. An organism that has two different alleles for a trait and is considered heterozygous is called ---. a. purebred b. pedigree c. hybrid Tutorial Click here to continue Do You Know… Genetics 7. An organism that is genetically identical to the organism from which is was produced is a ---. a. clone b. purebred c. hybrid 8. A change in a gene or chromosome possibly caused from factors in an organism’s environment is a ---. a. genetic disorder b. carrier c. mutation Tutorial Click here to continue Do You Know… Genetics 9. An organism’s physical appearance, or visible traits is called ---. a. genotype b. alleles c. phenotype 10. A chart that shows all the possible combinations of alleles that can result from a genetic cross is ---. a. probability b. a Punnett Square c. a data table Tutorial Click here to continue Do You Know… Genetics 11. An organism’s genetic makeup, or allele combination is called ---. a. genotype b. alleles c. phenotype 12. The process that occurs in sex cells by which the number of chromosomes is reduced by half is called ---. a. mitosis b. cloning c. meiosis Tutorial Click here to continue Do You Know… Genetics 13. An organism that always produces offspring with the same form of a trait as itself is considered homozygous, or ---. a. purebred b. hybrid c. codominant 14. The study of the passing of traits from parents to offspring is called ---. a. genetics b. heredity c. chemistry Tutorial Click here to continue Do You Know… Genetics 15. He was a priest. He tended a monastery garden. He was a teacher. He has been called the Father of Genetics. a. Sir Isaac Newton b. Albert Einstein c. Gregor Mendel 16. A scientist that uses Punnett Squares to show all the possible outcomes of various genetic combinations of inherited traits are ---. a. biologists b. chemists c. geneticists Tutorial Click here to continue Do You Know… Genetics T t T t 17. According to the Punnett Square above, which combination will not be a possible outcome? a. all homozygous b. 25% homozygous c. 75% heterozygous Tutorial Click here to continue Do You Know… Genetics __ __ __ BB bb __ BB bb 18. According to the Punnett Square above, what traits will the female parent contribute? a. B b. b c. it is not represented THE END... Back to Home Page End Program CORRECT CORRECT CORRECT 1-2 3-4 5-6 7-8 9 - 10 11 - 12 Click on a set for more questions 13 - 14 15 - 16 Click for Tutorial 17 18 INCORRECT INCORRECT 1-2 3-4 5-6 7-8 9 - 10 Don’t stress click on a set of questions to try again! Click for Tutorial 11 - 12 13 - 14 15 - 16 17 18 Genetics Genetics Genetics is the study of heredity. The passing of traits form parents to offspring is called heredity. A young priest from central Europe named Gregor Mendel began a study of pea plants while tending a monastery garden that led him to an understanding of how traits are passed from parents to offspring. Mendel was the first scientist to recognize that the principles of probability can be used to predict the results of genetic crosses. Geneticists use the laws of probability to help them determine the possible outcomes from a genetic cross. A way to show these genetic crosses is to use a Punnett Square. An organism can be homozygous which means it will have two identical alleles for a particular trait. These organisms are said to be purebred. An organism can be heterozygous meaning it has two different alleles for a particular trait and is considered to be hybrid. Would you like to go back to the questions? Click to End Program…. Genetics Genetics A Punnett Square is a method of showing the possible outcomes of genetic crosses. This method indicates what can happen in a particular parent cross, not necessarily what will happen. The parent generation is the first organisms in a particular cross. The offspring from such a cross are named according to the order they are produced. For example, the First Filial (F1) generation would be the offspring from a first cross. If these offspring are allowed to cross, the next offspring would then be the F2 generation and so on. Filial means son or daughter in Latin. Female Parent T t T TT Tt t Tt tt Male Parent Offspring 25% TT homozygous 50% Tt heterozygous 25% tt homozygous 50% are expected to be purebred; homozygous. 50% are expected to be hybrid; heterozygous. Would you like to go back to the questions? Click to End Program…. Tutorial Choices Choices Tutorial Genetics Hybrid Heredity Genetic Crosses using a Punnett Square Punnett Square Parent and Filial Gregor Mendel Heterozygous Homozygous Purebred Would you like to go back to the questions? Click to End Program…. Question Options Options Question 1-2 3-4 5-6 11 - 12 Click on a set for more questions 13 - 14 15 - 16 7-8 17 9 - 10 18 Would you like to review the Tutorial again? Would you like to take the test again? Click to End Program…. Hope you enjoyed your practice! If you did well you should pass your test with flying colors! Go To Another Test? Astronomy Chemistry Chemical Reactions Would you like to review the Tutorial again? Would you like to take the test again? Click to End Program…. “Do You Know” Series is a copyrighted series created by Ellen Thames, Spring 2006. All clipart copyright Microsoft. Diagrams and Tutorial information adapted from Prentice Hall Science Explorer, 8th grade edition, 2002 Electricity Formulas and Equations Geology Matter Genetics Physics