Genetics Question Preview (ID: 40226)


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Mendle started with pure bred purple(PP) and pure bred white(pp). The offspring were all heterozygous purple(Pp). Then he crossed (Pp) with (Pp) and got (PP), (Pp), (Pp) and (pp). what ratio of Purple to white blooms would he expect now?
a) All the plants would be purple
b) 3 purple to 1 white
c) 3 white to 1 purple
d) All the plants would be white

For centuries farmers have selected certain plants and animals for selective breeding. What is the purpose of choosing the organisms instead of just letting them all reproduce?
a) the farmers select certain parent organisms in order to get valuable traits in the offspring
b) the farmers want to control the size of certain animal and plant populations
c) the farmers can only have one kind of animal at a time on the farm
d) controlling which plants and animals can reproduce reduces competition for resources

Which is the most likely goal of selective breeding on a farm?
a) A cow that produces less milk than other cows.
b) A horse that is stronger than other horses.
c) Corn that is smaller and less flavorful than other corn.
d) Wheat that grows slow and attracts insects.

At a local pet store, 24 Silky Terriers, 22 miniature poodles, 21 Brussles Griftons, 20 Boston Terriers and 4 mixed breed dogs were sold . Which of the breeds was LEAST LIKELY to be selectively bred?
a) Mixed Breed
b) Boston Terrier
c) Miniature Poodle
d) Silky Terrier

Mendel's early work with pea plants demonstrated a significant genetic discovery. The crossing of homozygous tall pea plants with homozygous short pea plants always resulted in tall plants and demonstrated that tallness in pea plants is a ___ trait
a) blended
b) dominant
c) mutated
d) recessive

Which structure stores most of the genetic information?
a) Mitochondria
b) Nucleus
c) Ribosome
d) Lysosome

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

Which statement best describes how traits are passed from one generation to the next?
a) traits are acquired by offspring through innate and learned behaviors
b) traits are passed to the offspring through the blood of both parents
c) traits are passed to the offspring through genes located on hereditary material from the parents
d) traits are inherited during the first year of life as babies watch and imitate parents

In monitor lizards, the dominant L is for long tails. The recessive l is for short tails. A female lizard with the genotype LL mates with a male lizard with the genotype Ll. What are the possible phenotypes for the offspring?
a) long tails
b) short tails
c) LL
d) medium length tails

The allele for black hair, B, is dominant to orange tabby color, b, in cats. From a Punnett Square showing genotypes of Bb, Bb, bb, and bb; what did the parents look like in this genetic cross?
a) two tabby parents
b) two black parents
c) one black parent, one tabby parent
d) both parents were a mix of black and tabby

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