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Thursday 14 November 2019

genetics

Asexual reproduction

When it comes to asexual reproduction, it only really needs one parent. Why? Because it takes less time to find a mate and they don't have to go through the pregnant stage. Asexual offspring are identical to the parent, like little clones running all over the place, and because they don't have to worry about creating different genes for individuality, that means the chance to make many of that species.

sexual reproduction

different from asexual reproduction, sexual reproduction requires two parents. the offspring are similar  but not identical, the offspring is normally a combination of both of their parent's personalities/characteristics, this also means that a few of the offsprings may be better suited  to survive in their habitat.. and going into more depth about it means that the species can become more successful over time. the benefits of producing an offspring are the variation of the costs of finding a mate, breeding and producing the offspring.







the term ' species' is used by scientists to express organisms of the same type, one of the reasons for all species is to survive and reproduce, passing on their characteristics from one generation to the next.

now we are going to talk about cells, chromosomes, and DNA

first of all, DNA stands for ( deoxyribonucleic acid ).
People for generations have been asking and questioning, why do offsprings not look exactly like there parents but look similar?
 well...
all organisms are made of cells, an adult had 50 trillion to even 100 trillion of them..crazy I know.. all human cells contain a nucleus ( except red blood cells ). The nucleus is also known as the 'control centre' it contains the instructions that tell the cell how to function, Humans have 46 chromosomes in every cell in their body,  23 of these chromosomes were inherited by your dad and 23 were inherited by your mother. Chromosomes are made of a molecule called deoxyribonucleic acid (DNA), a section of DNA that contains instructions for a particular feature, for example, your hair colour is a gene as well as your eye colour and your height.

In 1962, Nobel prize for medicine was awarded to Francis Crick, James Watson and Maurice Wilkins for the discovery of the structure of DNA, He obtained PhD in 1940 from Birmingham University.

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