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Principles Of Genetics Quiz 14 (30 MCQs)

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1. Multiple Alleles
2. A ..... crosses one trait.
3. In 1866, Gregor Mendel published the results of experiments involving pea plants. In one experiment, Mendel crossed plants that produced smooth, yellow peas with plants that produced green, wrinkled peas. Every pea in the first generation crop from this cross was yellow and smooth. What conclusion did Mendel draw from this experiment?
4. Gametes are eggs and sperm (sex cells). Human have 46 chromosomes, but how many are found in their gametes?
5. In Mendel's experiments, what is the approximate ratio of dominant to recessive expression when both parents are hybrids?
6. Mendel discovered principles of inheritance because he:
7. The offspring of purebred pea plants with round seeds will always have ..... seeds.
8. Which of the following is an example of multiple alleles?
9. When 2 pea plants heterozygous for height (Tt) are crossed, what is the ratio of the resulting genotypes (TT:Tt:tt)?
10. What principle states that during gamete formation genes for different traits separate without influencing each other's inheritance?
11. Thomas Hunt Morgan worked with which organisms to show that Mendel's principles applied to living things other than plants.
12. Having freckles is dominant (F), and not having freckles is recessive (f). A mother has Ff and a father has Ff. If they have a child, which genotype will make their child not have freckles?
13. In pea plants, the allele for green pods (G) is dominant and the allele for yellow pods (g) is recessive. A researcher crosses two green pea plants, and the in F1 generation, all of the offspring exhibit green pods. Can you determine the genotypes of both parents
14. What symbol is used for a dominant trait?
15. Meiosis produces ..... in gametes.
16. If a ..... allele is present, its trait will appear in the organism.
17. This phenotype is more likely to be prominent in offspring
18. Which phase best describes the process of meiosis?
19. A person who codes for a trait but it is not expressed is called
20. What does genotype mean?
21. Heredity describes how ..... are passed down from parents to offspring.
22. The combination of alleles (letters) that is used to describe dominant and recessive alleles.
23. What is the process that occurs in prophase I where two chromosomes exchange genetic material?
24. James is conducting an experiment to test the effect of insecticides on frogs. What is the control group in his experiment?
25. Sexual reproduction would be more advantageous than asexual reproduction for organisms living in an environment that is diverse and undergoes frequent changes
26. The scientific study of heredity is known as .....
27. What was the first generation of plants called that resulted from crossing the two parent plants?
28. A sudden change in the molecular structure of a gene, called a(n) ....., may occur spontaneously or may be caused by an environmental event such as radiation.
29. Whats a dihybrid cross
30. If an organism's diploid number is 12, its haploid number is
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