Thames & Kosmos Genetics & DNA Lab handleiding

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Thames & Kosmos

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Handleiding

BRAIN TEASER

Suppose each of your grandparents has

two programs to pass on. Each of them

passes both programs on to your parents, and

each of them in turn to you. If it worked this

way, how many programs would you have?

ANSWER:

3. What

combinations

arise in the

offspring from

these red plants?

Place the plastic

chips in the grid

to the right.

You will ﬁnd the

solution on page

47.

In science as in art, recognition

often comes late

Mendel’s ground-breaking insight was hardly noticed

by his contemporaries, and passed into oblivion for

more than 30 years. Not until 1900 did other

researchers unearth his work and say: Wow, this guy

ﬁgured out the basis of heredity! If you want to read

more about Mendel and his work, go to the web site:

www.mendel-museum.com

Heredity: Investigating Traits | 

EXPERIMENT 

Mendel’s breakthrough:

As if by magic, all of a sudden, plants

with red ﬂowers would produce offspring

with white ﬂowers. Mendel used this

kind of experiment to reveal the fact that

there were hidden programs with a

secret life of their own, operating behind

the scenes to control the features of

living things. You might be saying, “Pea

plants are boring! I couldn’t care less

about the colors of their ﬂowers!”

Okay, but it can also work like this:

What would you think if all of a sudden a

kid with red hair cropped up in a family in

which the parents and grandparents only

had brown hair? This new discovery

would explain it: Features that would

otherwise remain hidden, that have been

suppressed by the dominant program

copies, suddenly have the chance to

express themselves when a pair of them

are present together in the same

organism.

→

WHATS HAPPENING

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