Genetics: Pick Me! Pick Me!
A Selective Breeding Article
Analysis about Hybridization
Name: _________________________
great to create an organism that has
all the traits you desire and is made just for YOUR
needs? You CAN with a form of selective breeding
called hybridization!
Objective:
To understand the process of
hybridization, a type of selective breeding.
Access the article from the NY Times:
Accompanying Reading Questions
Background Information:
Selective Breeding is the process by which humans breed animals or plants to
achieve desired traits. This is typically carried out with domesticated organisms,
however, humans have bred wild animals as well.
Hybridization is a form of selective breeding that has been around for as long
as man has lived and worked with domesticated animals. Hybrids are bred by
mating two species of organisms (usually plant or animal) that belong to the same
genus. The offspring will have traits that both parents exhibit.
There is one major drawback for hybrids; most are sterile, meaning that they
are derived from parents with different numbers of chromosomes and the parent
chromosomes have different structures. These differences cause an issue when the
hybrid makes gametes, or sex cells, during meiosis. The chromosomes have
difficulty pairing up during meiotic division because of their structural and
numerical variations and thus the sex cells are created inconsistently, making the
sperm and egg unviablen natureTheir uniqueness dies with
them.
© Getting Nerdy, LLC
Genetics: Pick Me! Pick Me!
A Selective Breeding Article
Analysis about Hybridization
Name: Mateus
_________________________
Fernandes
Read the NY Times article about Hybrid organisms and answer the following questions:
1. What is a wholphin and how is it unique from its parents?
__________________________________________________________________________
A
wholphin is a hybrid from a whale and a dolphin it is unique because it is a hybrid from both of them.
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2. What percentage of animal species may occasionally breed with other species in the
10
25
wild?____________
What percentage of plants?____________
3. Hybrids are sometimes infertile. What does this mean?
Evolutioanry
dead ends.
__________________________________________________________________________
__________________________________________________________________________
4.
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It's
because most of these hybrids are not capable of being able to breed.
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5. Besides infertility, what other problems do hybrids face?
Even
if they are fertile they are usually outnumbered and out competed bu one or more of the parent
__________________________________________________________________________
species.
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6. B
gene combinations can allow hybrids to do what?
To
adapt to conditions that neither parents might not be able to adapt to.
__________________________________________________________________________
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7.
They
are able to survive on more extreme weather.
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8. What are the three hybrid sunflower species and where does each live?
a. Sand, sunflower, utah
b. puzzle sunflower, salt marshes, new mexico
c. Desert sunflower, deserts
9.
wer species live?
In
parental habitat.
__________________________________________________________________________
__________________________________________________________________________
10.Why does the Lonicera fly prefer honesuckle as its host plant?
Because
the parental species were more likely to meet at the Lonicera fly.
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__________________________________________________________________________
11.A small percentage of some human DNA has a connection to Neanderthal. What did
Neanderthal genes possibly help modern humans do?
To
adapt to new climates and habitats.
__________________________________________________________________________
__________________________________________________________________________
© Getting Nerdy, LLC