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CSET Genetics

Subjects : cset, science, genetics
Instructions:
  • Answer 33 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A cross between 2 pea plants hybrid for a single trait produces 60 offspring. Approximatley how many of the offspring would be expected to exhibit the recessive trait?






2. An organism with a dominant allele for a particular form of a trait will always exhibit that form of the trait. (ex. Bb --- The big B would be dominant B






3. 2 organisms may show the same trait - yet have different genotypes for that phenotype






4. For a given trait - the 2 genes of an allelic pair are not alike. An individual possessing this gene combination is said to be...






5. Term used to refer to an organism that has two different alleles for the same trait Bb






6. States that genes for different traits can segregate independently during the formation of gametes and helps account for the many genetic variations observed in pants - animals - and other organisms






7. Term used to refer to an organism that has two identical alleles for a particular trait BB






8. A characterstic in which a person has 6 fingers per hand. Polydactlyl is dominant over the trait for 5 fingers. If a man who is heterozygous for this trait marries a woman withthe normal number of finger






9. Kids heterozygous Ww






10. The inherited characteristic often masked by the dominant characteristic and not seen in an organism. bb






11. In guinea pigs - black coat color is dominant over white coat color. The offspring of a mating between 2 heterozygous black guinea pigs would probably show a genotype ratio of...






12. Different Bb






13. If a breeder wanted to discover whether a black guinea pig was homozygous (BB) or heterozygous (Bb) for a coat color - the animal in question would be crossed with an individual of what genotype?






14. An organism's physical appearance - or visible traits






15. Same BB






16. P is reccessive






17. Threadlike structures made of DNA molecules that contain the genes.






18. In peas - flowers located along the stem (axial) are dominant to flowers located at the end of the stem (terminal). Let A represent the allele for axial flowers and a represent the allele for terminal flowers. When plants with axial flowers are cross






19. One capitol letter W






20. In cabbage butterflies - white color (W) is dominant and yellow color (w) is recessive. If a pure white cabbage butterfly mates with a yellow cabbage butterfly - all the resuting (F1) butterflies are heterozygous white. Which cross represents the gen






21. 6 fingers F






22. How many pairs of chromosomes do humans have?






23. When a mouse with black fur is crossed with a mouse with white fur - all f1 generation offspring have gray fur. Which phenotypic results can be expected in the F2 generation.






24. Creates a blended phenotype; one allele is not completely dominant over the other






25. Different forms of a gene






26. The appearnce of a recessive trait in offspring of animals most probably indicates that...






27. In horses - black color is dominant over chestnut color. 2 black horses produce both black and a chestnut colored offspring. If coat color is controlled by a single pair of genes - it can best be assumed that...






28. Dominance B






29. Having two like genes






30. Chromosomes that do not determine the sex of an individual






31. Explain how organisms can have the same phenotypes and different genotypes.






32. Man is Pp and woman is pp Pp x pp equals Pp - Pp - pp - pp 50% chance






33. (genetics) the separation of paired alleles during meiosis so that members of each pair of alleles appear in different gametes