Genetics Practice Multiple Choice Test

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Genetics Practice Multiple Choice Test

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In sexual reproduction, a new organism is produced when

Altering the DNA of an organism in order to get the traits we want is called ____.

4. When we did the PTC lab, it was found that tasting for PTC is a dominant trait. Would a non-taster also have to have a non-taster as a parent?

The combination Tt represents a _ genotype, where T means _, and t means ___.

6. During our “A Game of Chance” activity where you were “making a baby”, what was the % chance of having a boy versus a girl?

7. DNA is a double helix which means that it is shaped like a __________.

8. What would the complementary strand of DNA be for the sequence of bases ACCTAGTTG?

In our activity where you made a baby, who determined the sex of the offspring and why?

Proteins are made by reading the __ given by _.

What does the nucleus of the cell contain and what does it do?

__makes two identical body cells, while _ makes sex cells like the sperm and egg.

14. Cloning is like _ reproduction in that it creates

A hybrid organism can result when...

16. An organism whose genotype is Tt is considered a while an organism with the genotype tt is a _.

A strange disorder causing toes to sprout out of one’s back is discovered to be dominant. A heterozygous female marries a heterozygous male. What percentage of the offspring will have fingers sprouting out of their back?

If the body cells in an organism have 10 chromosomes, then the sex cells produced during meiosis would have _____ chromosomes.

19. Dimples are dominant to no dimples. Ben’s mom is heterozygous for dimples and his dad is homozygous dominant for the trait. What genotypes can result from the cross of Ben’s parents?

21. In purple-people-eaters, one horn is dominant and no horn is recessive. If a purple-people-eater that is heterozygous for horns crosses with one that does not have horns, what are the genotypes of the parents?

22. In a certain species of dog, a black nose is dominant over a pink nose. If my dog Gunner is homozygous for a pink nose and she mates with a purebred dominant male, what is the ratio of black to pink noses?

23. In parakeets, the ability to talk is a dominant trait. A heterozygous talker is mated with a non-talking parakeet. What is the ratio of talkers to non-talkers?

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