Hello Ma'am!!!!!!!!!
This is my blog for last week,,,about genetics..........
You know Ma'am,,,, I understand this lesson very
well,,,,,,,,specially on the monohybrid
cross,,,ASTIG!!!!!!!!!!!!!
Genetics (from Ancient Greek γενετικός genetikos, “genitive” and that from γένεσις genesis, “origin”[1][2][3]), a discipline of biology, is the science of heredity and variation in living organisms.[4][5] The fact that living things inherit traits from their parents has been used since prehistoric times to improve crop plants and animals through selective breeding. However, the modern science of genetics, which seeks to understand the process of inheritance, only began with the work of Gregor Mendel in the mid-nineteenth century.[6] Although he did not know the physical basis for heredity, Mendel observed that organisms inherit traits in a discrete manner—these basic units of inheritance are now called genes.
A monohybrid cross is a cross between parents who are heterozygous at one locus; for example, Bb x Bb (see the Punnett square below). Example: B=brown. b=blue. BB=Dark Brown. Bb=Brown not blue. bb=Blue.
Monohybrid inheritance is the inheritance of a single characteristic. The different forms of the characteristic are usually controlled by different alleles of the same gene. For example, a monohybrid cross between two pure-breeding plants (homozygous for their respective traits), one with yellow seeds (the dominant trait) and one with green seeds (the recessive trait), would be expected to produce an F1 (first) generation with only yellow seeds because the allele for yellow seeds is dominant to that of green. A monohybrid cross compares only one trait.
That's all for this week...........
GOD BLESS!!!!!!!!!!!
Saturday, February 21, 2009
...............All about GENETICS....................
Posted by trisha_angela_t._ de_ jesus at 5:18 PM 0 comments
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