Answer:
Please find the explanation below.
Explanation:
Changes in the genetic sequence of a DNA is called MUTATION. A gene is a segment of the DNA that holds information for the synthesis of proteins, which are responsible for the observable traits in organisms. The expression of a gene brings about the synthesis of a protein that effects a particular trait in an organism. The gene is expressed in two major stages viz: transcription and translation.
Transcription involves production of an mRNA molecule using the encoded information in the genes of a DNA while translation is the synthesis of a protein using the mRNA as a template.
Since, the order of the sequence in a gene determines the order of the sequence in the mRNA which ultimately determines the order of sequence in the protein, a change in the gene of an organism will affect the observed trait of that organism.
More detailedly, a change in the gene will cause a change in the mRNA sequence during transcription. A change in the mRNA sequence will cause a change in the amino acid sequence during translation. A change in the amino acid sequence will affect the protein produced i.e. might not be functional or may not be produced at all. An affected protein will cause a trait in that organism to be affected.
Answer:
All living and non-living things are made of one or more unique substances called elements, the smallest unit of which is the atom, (for example, the element oxygen (O) is made of O atoms, carbon (C) is made of C atoms and hydrogen (H) is made of H atoms. Atoms combine to form molecules. Molecules can be small (for example, O2, oxygen gas, which has 2 atoms of the element O; CO2, carbon dioxide, which has 1 atom of C and 2 of O), medium (for example, C6H12O6, glucose, which has 6 atoms of C, 12 of H, and 6 of O); or large (for example molecules called proteins are made of hundreds of atoms of C, H, and O with other elements such as nitrogen (N). Molecules are the building blocks to all structures in the human body.
Explanation:
I found the exercise on the internet and these were the options:
"A)Did this girl grow up in a single-parent mother-headed family?
B)Was this girl insecurely attached?
C)Did this girl have a stressful childhood?
D)<span>Does this girl have many siblings?"
Correct answer: D
The number of siblings is not a factor that promotes early puberty in girls. All the other factors do have an impact although the mechanisms are yet not very well known. When there is not a father figure present, girls tend to reach puberty earlier. When they are insecurely attached to their mother, girls also tend to reach puberty earlier. Lastly, another factor that may lead to an earlier puberty in girls is the stress they've passed through during childhood - mostly from family conflicts, whether with parents or siblings.</span>
If they are both heterozygous, then they both have alleles Bb.
Using a Punnett square, we draw the following:
B b
B BB Bb
b bB bb
Since B is dominant, so only bb will give white fur, i.e. 1 out of four is expected to give white fur.
Probability is therefore 1/4.
Dendrite; axon; synapse
These are parts of the neuron which is considered as the basic unit of nervous system. The cell responsible for receiving sensory input from the external environment. The stimulus will be transported in an electrical signal via neuronal parts. Axon transmit signal to the other neuron. Dendrites are the receiving part of the neuron. Synapse is the space between each neuron where elctrical impulse is converted into a chemical signal via neurotransmitters.