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Genetics

Our knowledge of cells, how they react and how they can be manipulated, is advancing rapidly. Words such as cloning, genetic manipulation, GMO’s and gene therapy are becoming part of the everyday vocabulary in the media. Cell-biology, genetics and related fields are becoming even more important study disciplines.

Core information is passed on during the process of fertilisation. This information can be described as the plan according to which the new organism is to develop. The plan is inscribed in a special molecule, known as DNA. DNA consists of codes. These codes determine all the features of the new organism.

These codes are found in short units called genes. The study of this molecule and structures such as genes, and the way in which it is passed on from one generation to the next, is called genetics.

Activity 2:

To find information on genetic manipulation

[lo 1.7, 2.2]

Do the following on your own:

a) Go to the library and find information on different types of plants that have been genetically manipulated to ensure a higher production of crops. This is an example of how technology is used for development. Write down in your own words what you understand under genetic manipulation, and what is meant by technology. Find out what happens in laboratories, and how scientists in different fields contribute to the development of a country.

b) Visit the following website on the internet (you will be able to find many others):

Google.com:

Saby Ganguly: From Bengal Famine to the Green Revolution (Use the title or key words in the title to execute a search).

Peter Rosset, Joseph Collins, Francis Moore Lappé: Lessons from the Green Revolution , Tikkun Magazine, March/April 2000

DIscuss the following statements in groups of two:

Activity 3:

To determine the effects of the use of toxic substances on human beings and the environment

[lo 2.1]

Pesticides can be applied to protect crops against damage from insects. It may, however, also have a negative influence on the eco-system.

  1. Get absolute clarity on the meaning of the above statement.
  2. Find out what detrimental effects the use of pesticides may have on human beings and the environment.

Activity 4:

To establish if food production in the rsa is sufficient to meet the needs of the people

[lo 2.3]

The big challenge facing the agricultural sector, is to produce enough food to provide for the world’s fast growing population. In certain parts of the world, however, there are already people who cannot be fed sufficiently, and even die of hunger. According to the figures of the World Bank, over 840 million people in the world did not have enough to eat in the year 2000. In developing countries about 30 people per minute die of a food shortage. The production of food will have to increase by 50% to feed the additional two billion of people towards the year 2025. This makes the present situation much more complex than before the beginning of the Green Revolution in the 1970’s.

  1. Is this also happening in our country?
  2. Are there also people who eat too much?

Questions & Answers

show that the set of all natural number form semi group under the composition of addition
Nikhil Reply
what is the meaning
Dominic
explain and give four Example hyperbolic function
Lukman Reply
_3_2_1
felecia
⅗ ⅔½
felecia
_½+⅔-¾
felecia
The denominator of a certain fraction is 9 more than the numerator. If 6 is added to both terms of the fraction, the value of the fraction becomes 2/3. Find the original fraction. 2. The sum of the least and greatest of 3 consecutive integers is 60. What are the valu
SABAL Reply
1. x + 6 2 -------------- = _ x + 9 + 6 3 x + 6 3 ----------- x -- (cross multiply) x + 15 2 3(x + 6) = 2(x + 15) 3x + 18 = 2x + 30 (-2x from both) x + 18 = 30 (-18 from both) x = 12 Test: 12 + 6 18 2 -------------- = --- = --- 12 + 9 + 6 27 3
Pawel
2. (x) + (x + 2) = 60 2x + 2 = 60 2x = 58 x = 29 29, 30, & 31
Pawel
ok
Ifeanyi
on number 2 question How did you got 2x +2
Ifeanyi
combine like terms. x + x + 2 is same as 2x + 2
Pawel
x*x=2
felecia
2+2x=
felecia
×/×+9+6/1
Debbie
Q2 x+(x+2)+(x+4)=60 3x+6=60 3x+6-6=60-6 3x=54 3x/3=54/3 x=18 :. The numbers are 18,20 and 22
Naagmenkoma
Mark and Don are planning to sell each of their marble collections at a garage sale. If Don has 1 more than 3 times the number of marbles Mark has, how many does each boy have to sell if the total number of marbles is 113?
mariel Reply
Mark = x,. Don = 3x + 1 x + 3x + 1 = 113 4x = 112, x = 28 Mark = 28, Don = 85, 28 + 85 = 113
Pawel
how do I set up the problem?
Harshika Reply
what is a solution set?
Harshika
find the subring of gaussian integers?
Rofiqul
hello, I am happy to help!
Shirley Reply
please can go further on polynomials quadratic
Abdullahi
hi mam
Mark
I need quadratic equation link to Alpa Beta
Abdullahi Reply
find the value of 2x=32
Felix Reply
divide by 2 on each side of the equal sign to solve for x
corri
X=16
Michael
Want to review on complex number 1.What are complex number 2.How to solve complex number problems.
Beyan
yes i wantt to review
Mark
16
Makan
x=16
Makan
use the y -intercept and slope to sketch the graph of the equation y=6x
Only Reply
how do we prove the quadratic formular
Seidu Reply
please help me prove quadratic formula
Darius
hello, if you have a question about Algebra 2. I may be able to help. I am an Algebra 2 Teacher
Shirley Reply
thank you help me with how to prove the quadratic equation
Seidu
may God blessed u for that. Please I want u to help me in sets.
Opoku
what is math number
Tric Reply
4
Trista
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
Sidiki Reply
can you teacch how to solve that🙏
Mark
Solve for the first variable in one of the equations, then substitute the result into the other equation. Point For: (6111,4111,−411)(6111,4111,-411) Equation Form: x=6111,y=4111,z=−411x=6111,y=4111,z=-411
Brenna
(61/11,41/11,−4/11)
Brenna
x=61/11 y=41/11 z=−4/11 x=61/11 y=41/11 z=-4/11
Brenna
Need help solving this problem (2/7)^-2
Simone Reply
x+2y-z=7
Sidiki
what is the coefficient of -4×
Mehri Reply
-1
Shedrak
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Geography grade 9. OpenStax CNX. Sep 14, 2009 Download for free at http://cnx.org/content/col11057/1.1
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