Well buddy, this time we will discuss the definition and sound Mendel's Law, we just enter into the discussion. THE DEFINITION MENDE...
Well buddy, this
time we will discuss the definition and sound Mendel's Law, we just enter into
the discussion.
THE DEFINITION MENDEL'S
LAW
Legal terms Mendel was
adapted directly from the inventor namely Johan Gregor Mendel. Johan Gregor
Mendel experimented with the cultivation of peas / peas (Pisum sativum).
Mendell pick peas due to having beneficial properties for the experiment to be
done. As for the properties owned preparations, include:
1. Pea easily crossed;
2. Peas can self-pollinating;
3. Immediately can produce offspring that much with the onset of life
is relatively short;
4. Have a couple that are glaring.
From these experiments
was born the basic principles of genetics that he poured in an article titled
"Experiment In Plant Hybridization" or in Indonesian called
"Experiments on Plant Crosses". The basic principle of genetics is
formulated into two laws, namely the law of segregation (segregation of alleic
genes) and paired law independently (independent assortment of genes). The
second law is what today we know as the law Mendell. So, in general the law
Mendell discusses how the process of heredity in organisms.
MENDEL'S LAW SOUND
As already mentioned
in the previous point, the laws of Mendel consists of two parts, covering:
Legal separation (segregation of alleic
genes)
Legal separation /
segregation explains the rules of segregation of alleles during gamete formation.
In the event of formation of gametes (mieosis), pairs of homologous gene (the
same) will be separated into two daughter cells from diploid cells into haploid
gametes so that each receives one gene from each alelnya. This segregation law
has three main parts, namely:
Genes have alternative forms of governing
variations in the nature of derivatives. This is the concept of alleles.
Alleles are divided into two kinds, resisif alleles (alleles that are less
visible, expressed in lowercase) and the dominant allele (allele which looks
from the outside, expressed in uppercase).
Each individual carries the gene pair to
form each character inherited from each parent (female and male).
If the gene pair consists of two different
alleles, the dominant allele will be expressed fully (to be more visually and
will cover the recessive allele), while the recessive allele will not be fully
expressed (visually less visible). However, the recessive allele will still be
passed on gametes formed derivatives.
Law of segregation
phenomena can be observed in monohybrid cross, which crosses one character with
two different properties. Examples monohybrid cross is like a cross between the
white roses red roses dominant trait with recessive trait. If stated in the
letter, then the dominant white roses are written in capital letters namely MM.
While red roses recessive trait is written in small letters in the form of mm.
Consider the following crosses.
P1: MM x mm
G1: M xm
F1: Mm
Description:
P = Parenteral =
pure Individuals
G = Genotype = The
composition of heredity (not visually)
F = Phenotype =
Property that appear in the offspring
From the cross at
the top, at the time of gamete formation parenteral, free merger between M by m
to produce two kinds of alleles that Mm with the different types of properties.
This phenomenon is called the law of Mendell I.
Legal mounting independently (independent
assortment of genes)
The mounting legal
freely / asortation also known as Mendel's laws II. In this law, Mendel stated
"if two individuals have two pairs or more properties, then lowered a pair
of free nature, does not depend on the nature of the other spouse." This
legal phenomenon can be observed in dihybrid cross. An example of a cross
between a round green mango is dominant with mango yellow oval is recessive. If
stated in the letter, then the round green mangoes are dominant in capital
letters that BBHH. While mango yellow oval is recessive written in small
letters in the form of bbhh. Consider the following crosses.
P1: BBHH x bbhh
G1: BH x bh
F1: BbHh
P2: BbHh x BbHh
G2: BH, BH, bh, bh
Description:
P1 = Parenteral =
pure Individuals
G1 = Genotype = The
composition of heredity (not visually)
F1 = Phenotype =
Property that appear in the offspring
P2 = Parenteral =
Individual derivative pure individual
Genotype G2 = =
Composition hereditary factors do not appear on parenteral 2nd
F2 = Phenotype =
Property that appear in the offspring parenteral 2nd
Based on the cross,
at the time of gamete formation parenteral 2nd, free merger between B and B
with K and k thus produced four different combinations of gametes, namely Bh,
Bh, bh and bh. The process of gamete formation is called the law of Mendell II.
Thus, we can conclude that alleles with different properties do not affect each
other.
Well buddy, this is
our discussion this time regarding the definition and sound Mendel's Law, may
be useful for all my friends.
