Genetics Unit Test Review Question Preview (ID: 41534)


Genetics Unit Test Review. TEACHERS: click here for quick copy question ID numbers.

In pea plants, stem height is a trait. The dominant form is tall (T) and the recessive form is short (t). What is the PHENOTYPE for a heterozygous tall pea plant?
a) tall
b) TT
c) Tt
d) short

A chart shows how a trait passes down in a family. This chart is called a __________________.
a) pedigree
b) Punnett square
c) chart
d) karyotype

Poodles, like all dog breeds, are so closely related to wolves that they can breed with them. What is the best explanation for why wolves and poodles do not look alike, despite being extremely close relatives?
a) Poodles are the result of people selectively breeding them for specific traits.
b) Wolves once resembled poodles, but the evolved to look differently.
c) Poodles have naturally evolved to look differently from wolves.
d) Wolves once resembled poodles, but quickly died out in the wild.

In Queen Victoria's royal family, what was true?
a) Queen Victoria was a carrier of hemophilia.
b) Albert had hemophilia.
c) All of the male children had hemophilia.
d) Queen Victoria had hemophilia.

When both the dominant and recessive traits are present, for example Rr representing round eyes, the genotype is _______________ for the trait.
a) heterozygous
b) a genetic disorder
c) homozygous
d) a recessive allele

Buffalo can tolerate hot and cold temperatures but have meat that is not as tasty and tender as beef. What good qualities might a beefalo (cross between cattle and buffalo) possess?
a) Animals that tolerate the heat and cold and have good tasting meat.
b) Animals with good tasting meat that do not tolerate the heat.
c) Animals that tolerate heat and cold but do not have good tasting meat.
d) Animals that tolerate cold but do not have good tasting meat.

What is true of the offspring of organisms that reproduce sexually with 2 parents?
a) They have some genetic traits of both parents, but they are not exactly like either.
b) They are genetically identical to one of the parents.
c) Genetically, they are completely different from their parents.
d) They always have twice as many chromosomes as their parents, since they have two parents.

SpongeBob is known for his big round eyes (R), which is dominant over an oval eye shape (r). If he is heterozygous for his round eye shape and marries a woman with oval eye shape, what type of eyes might the kids have?
a) Their offspring chances are 50% for round eyes and 50% for oval eyes.
b) Their offspring chances are 75% for round eyes and 25% for oval eyes.
c) Their offspring will have a 100% chance for round eyes.
d) Their offspring chances are 75% for oval eyes and 25% for round eyes.

Scientists use a diagram called a ___________________. This helps us predict the results of selective breeding offspring.
a) Punnett square
b) pedigree
c) family tree
d) genetic disorder

Mr. Thompson is a potato farmer who is trying to produce potatoes that are large and resistant to fungus. Which of these would be best for him to use to produce only large, fungus free potatoes?
a) Selective breeding
b) cloning
c) fertilizing
d) irrigation systems

George wants a particular cherry tree in his yard. He makes cuttings from his tall, white-flowered parent tree. The cuttings grow into new cherry trees. What is true about the offspring cherry trees produced from cuttings?
a) The offspring trees are clones of the parent tree, and they should look similar to the parent tree.
b) The offspring trees will vary greatly in height, but they will all have white flowers.
c) Son offspring trees will develop white flowers, while others will develop flowers of different colors.
d) The offspring trees will be inferior to the parent tree.

In pea plants, purple flowers are DOMINANT to white flowers. Suppose a purple flowered plant with genotype Pp is crossed with another purple flowered plant with the same Pp genotype. WHAT PERCENTAGE OF FLOWER WILL BE PURPLE?
a) 75%
b) 25%
c) 50%
d) 0%

Brian owns a peacock farm. One day, a large batch of chicks hatched, and Brian discovers that a few of the chicks are WHITE instead of BLUE. . If Brian wants to raise MORE WHITE PEACOCKS in order to make more money, what should he do?
a) He should isolate the white peacocks and allow them only to breed to each other.
b) He should always be sure to cross blue peacocks with white peacocks.
c) He should bleach the feathers of the blue peacocks before allowing them to breed with any white peacocks.
d) He should continue breeding the peacocks the same way.

________________ is the physical appearance or characteristics as a result of its combination of genes. (what it looks like.)
a) phenotype
b) genotype
c) Punnett Square
d) homozygous

All living things are made of _____________________.
a) cells
b) organs
c) blood
d) fibers

_______________ is known as the “Father of Genetics” who studied pea plant traits and their inheritance patterns.
a) Gregor Mendel
b) Stephen Hawkings
c) Charles Darwin
d) Mrs. Hutcheson

Mike and his three brothers all have brown hair. Mike's father has brown hair, too. Mike's mother is the only family member that has red hair color. What conclusion can you draw about the genes for hair color?
a) The gene for brown hair is dominant over the gene for red hair.
b) Neither brown nor red are dominant since they both occur in the same family.
c) Red and brown genes are co-dominant.
d) The gene for red hair is dominant over the gene for brown hair.

All living organisms are created through the process of _____________.
a) reproduction
b) growth
c) mitosis
d) selective breeding

Farmers who grow corn plants want the plants that produce the most years of corn and are most resistant to insects and disease. What process what a farmer used to produce the corn plants with these desired traits?
a) selective breeding
b) Asexual reproduction
c) Natural selection
d) cloning

How could crossing a white flower and a red flower produce plants with pink flowers?
a) The pink flower has incomplete dominant genes for BOTH red and white flowers.
b) The genes for red and white colored DO NOT AFFECT each other.
c) The pink flowers only get the genes for color from one of the parent plants.
d) The gene for pink color is in all flowers.

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