The codon is a set of 3 nucleotides that can be read to convey a message in your DNA. It can be a code saying to "start" the process of protein synthesis, or "stop" it, or to encode for an amino acid - the building blocks of proteins.
<span>The DNA is read, and proteins are made by DNA Polymerase (simple version here, it is more complicated, but this is the gist of it) travelling down the DNA. As it travels, it reads the nucleotides and builds a chain of amino acids, that corresponds to the information gleaned from the DNA. </span>
<span>So, the codon is only on one side of the DNA, and there are 2 sides. In order to be able to keep the DNA safe, and package it well (and loads of other reasons ) there is a complimentary strand. The nucleotides that make up DNA are A, T, C, and G. A links to T and C to G, and vice versa. </span>
So if your DNA strand's codons read "AAG AGG TCA"
Then the complimentary strand will read "TTC TCC AGT" the three codons on the complimentary strand ARE THE ANTICODONS of the codons on the strand being read (aka "expressed").
<span>So a codon and an anti codon are made of the same things, it just is a matter of which is being actively expressed. Now, this gets insanely complicated when you learn more about reading frames! Not only are there those codons, but if you shift and start reading the "code" either one nucleotide earlier or later, it completely changes the message.</span>
Answer:
Either B) increased parasympathetic stimulation of the heart. OR D) Constriction of elastic arteries to maintain blood pressure. I'm leaning more towards D) constriction of elastic arteries to maintain blood pressure.
Answer:
The genotypes shown represent gametes. False
One of the possible offspring genotypes is AABB. True
The parent genotypes are ABAbaBab×ABAbaBab. True
The parent genotypes are ABAbaBab×ABAbaBab. True
This cross shows two alleles for two traits. True
The gametes are diploid and the offspring are diploid. False
The genotypes shown are correct for a dihybrid cross. True
Explanation:
║ AB ║ Ab ║ aB ║ ab
AB║ABAB ║ ABAb║ABaB║ABab
Ab║ AbAB║ AbAb ║AbaB║Abab
aB║aBAB ║ aBAb ║aBaB║aBab
ab║abAB ║ abAb ║abaB ║abab
Drawing the Punnett square we can deduce that the genotypes shown do not represent gametes because there are more than 2 pairs of chromosomes.
As shown in the second column second row of the Punnett square one of the possible genotypes is AABB, it is distributed different (ABAB) but it is the same possible genotype.
The parents' genotypes are the ones that are written in the first columns and first row, they coincide with the ones in the statement.
A dihybrid cross shows the cross between two genes that have different traits.
The gametes are always haploid and the offspring are diploid because the two gametes come together.
Our genes can be affected by the environment and change the way our traits are displayed, called the phenotype. However, changes in phenotype have an underlying genotypic source. Epigenetics or epigenetic changes are changes in the way traits are expressed as an effect of the environment (i.e. food we ate, chemicals in the body, environmental stresses), without changes in the DNA. Simply put, in epigenetics, some parts of the DNA are turned on or off in response to environmental conditions.
