Applied Genetics Answers

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1
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Kip studies flower color in petunias, where the allele for red flowers, R, is dominant to the allele for white flowers, r. If Kip makes the cross RR x rr, the gametes that are produced

A
will all carry the r allele.
B
will all carry the R allele.
C
by one parent will carry R and by the other parent will carry r.
D
by one parent will carry Rr and by the other parent will carry rR.
2
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Unlike animal breeders and human geneticists, plant breeders rarely use pedigree charts in their work. Which is most likely the reason that plant breeders use other methods for analyzing results instead of constructing pedigree charts?

A
Plants have many more offspring than most animals have.
B
Plants have too many important traits to show in a pedigree.
C
Plants change only through mutation, not breeding.
D
Plants change too much in each generation to show in a pedigree.
3

Which is an example of selective breeding?

A
Planting peas in a garden one year and planting green beans the next year to enrich the soil.
B
Transferring pollen from flowers on one pea plant to flowers on another pea plant.
C
Comparing pea plants that have white flowers to green bean plants that have white flowers.
D
Grinding the peas from a pea plant into flour to create new food products.
6

Which was the most important contribution to society from the early selective breeder Luther Burbank?

A
an increased world food supply
B
more prize-winning rose varieties
C
a better understanding of devastating diseases
D
many kinds of vegetables related to wild mustard
8

Which term also describes selective breeding?

A
natural selection
B
artificial selection
C
survival of the fittest
D
overproduction of offspring
9

Which is an example of hybridization that would increase hybrid vigor?

A
producing a litter of puppies by mating two dogs of different breeds
B
using genetic engineering to insert a gene for vitamin A in carrot plants
C
pollinating the flowers on a tomato plant with pollen from a plant of the same variety
D
choosing a mate for a purebred cat from another litter of offspring from the same mother and father
11

Certain breeds of pets have weaknesses and live shorter lives because of

A
inbreeding.
B
reproduction.
C
genetic diversity.
D
natural selection.
12

Cole is making a pedigree chart for the dogs that he breeds. His chart will have shaded shapes to show dogs who carry the dominant trait that he wants to track. Which symbol should he use to show a second generation female who expresses that trait?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
13

Each horizontal row in a pedigree chart represents

A
a mating.
B
a generation.
C
several siblings.
D
several characteristics.
15

Which is the result of breeding individuals of different parentage?

A
genetic disease
B
hybrid vigor
C
genetic engineering
D
natural selection
16

Which is the greatest contribution of Gregor Mendel to society?

A
an ability to beautify the environment
B
the variety in breeds of dogs and cats
C
the increased speed by running horses
D
an understanding of genetic principles

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