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Principles Of Genetics Quiz 4 (20 MCQs)

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1. What is called when a organism has two identical alleles for a trait. TT or tt. RR or rr
2. What is an effect of Cystic Fibrosis (CF)?
3. A homozygous dominant round pea plant is crossed with a wrinkled pea plant. If the tall F1 pea plants are allowed to self-pollinate,
4. A gene for corn has two alleles, one for yellow kernels and one for white kernels. Cross pollination of yellow corn and white corn results in ears of corn that have an approximately even mix of yellow and white kernels. Which term best describes the relationship between the two alleles?
5. Physical characteristics studied in genetics are known as:
6. Which Mendelian law is represented by the ratios seen in a monohybrid cross?
7. When chromosomes fail to separate during meiosis it is referred to as ....., which can cause down syndrome and other genetic disorders.
8. The Law of Segregation states that each parent donates ..... copy/copies of each gene duringmeiosis.
9. Why does the DNA run to the positive probe?
10. Whats heterozygous
11. A chart that traces the inheritance of a trait in a family is called a
12. What is called when a organism has two different alleles for a trait. Tt or Rr
13. An allele whose trait always shows up in the organism when the allele is present.
14. Dogs that have parents of different breeds are very popular. Pomchis have one Pomeranian parent and one Chihuahua parent. Labradoodles have a Labrador retriever parent and a poodle parent. Crossbred dogs are hybrids and have a combination of traits from both parents' breeds.What genotype would the puppies have if two labradoodles were bred together?
15. Geologists have been on a quest to drill down to the mantle for several decades. The goal is to learn more about volcanoes, earthquakes, and how the planet works. The deepest hole so far is the Kola Superdeep Borehole in Russia. Over 20 years, a team drilled down 40, 230 feet. That's only halfway to the mantle in that spot. The team encountered unexpectedly high temperatures that ruined their equipment. In addition, high pressure caused the rocks to ooze and fill the borehole over and over.How does pressure change as you move from Earth's surface to the inner core?
16. The genetic characteristics of recessive genes
17. Each parent contributes one of the genes for a particular trait. The genes of the pair are called:
18. What would be the result if crossing over did not happen during meiosis in humans?
19. In Deoxyribonucleic acid, cytosine pairs with the nitrogen base .....
20. In guinea pigs, the alleles for black hair(B) is dominant to the allele for brown hair(b). Two black-haired guinea pigs are crossed. One of the pigs is homozygous for black hair and one is heterozygous. What percentage of their offspring are expected to have black hair?
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