Answer:
One allele is on one chromosome, and the other is in the same position (locus) on the homologous chromosome.
Explanation:
The genotype of an organism refers to the genetic makeup or complete set of genes. The genes control the trait of an organism and exist in an organism in their alternative form called alleles.
Since the alleles are the alternative form of a gene, therefore, they must be present at the same position called a locus.
These alleles are present on the homologous chromosome in which each homologous chromosome is contributed by each parent.Therefore when the genotype is aa then a and a allele will be present on homologous chromosomes in the same position.
Thus, the selected option is correct.
Answer:An alternative version of a gene
Explanation:
Answer:
Stem cells are self-renewal undifferentiated cells present in the human body. Undifferentiated means that they can divide and differentiate into many cell types of the body depending upon the differentiating potency of the stem cell.
If scientists could regulate the process of differentiation, they can able to differentiate a stem cell into a cell type of interest such as cardiac cell.
These cells are then can be used to replace the damaged or dead cells present in the body.
Thus, it can help in the treatment of diseases such as cardiovascular disease.
stem cell can differentiate to form heart muscle cells.
Answer:
He should get his mitochondrial haplotype sequenced, given the genetic variation in mitochondrial sequences compared to Y chromosomes.
Explanation:
A haplotype is a group of genes within an organism that was inherited together from a single parent. The word "haplotype" is derived from the word "haploid," which describes cells with only one set of chromosomes, and from the word "genotype," which refers to the genetic makeup of an organism.
Genetic variation is a term used to describe the variation in the DNA sequence in each of our genomes. Genetic variation is what makes us all unique, whether in terms of hair color, skin color or even the shape of our faces.
The typical metazoan mitochondrial DNA (mtDNA) is a double-stranded circular DNA molecule, which encodes a conserved set of 37 genes, including 13 protein-coding genes (PCGs) plus the two ribosomal RNA (rRNA) genes and 22 transfer RNA (tRNA) genes.
This, together with other special characteristics such as faster evolutionary rates than nuclear genes, presumed maternal inheritance, and absence of recombination makes mitochondrial DNAs one of the most popular targets for population genetics studies and accurate identification.
Answer:
The part of a flower stalk where the parts of the flower are attached.
Explanation:
Also known as stem
B. vibrate with the frequency of the received sound.
C. amplify the received sound.
D. carry the sound energy to the brain.
The middle ear's eardrum vibrates at the same frequency as the sound being heard, hence option B is correct.
Many species' ears serve as their sensory organs and as their hearing organs. Its structure may be broken down into three main sections: The outside ear, the Middle ear, and the Inner ear.
Pinna and ear canal make up the outer ear. Skin covers the hard cartilage that makes up the pinna. The pinna's primary job is to collect sounds and direct them into the ear canal. The middle ear may be reached through the eardrum.
The eardrum in the middle ear is what divides it from the outer ear. The eardrum vibrates when sound waves strike it at a specific frequency.
Therefore, the eardrum in the middle ear vibrates with the frequency of the received sound.
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The function of the eardrum in the middle ear is to vibrate with the frequency of the received sound.
Further Explanation:
Ear is the sensory organ of many organisms which performs the function of hearing.
Structurally it can be divided into three basic parts:
1. Outer ear
2. Middle ear
3. Inner ear
Outer ear consist of pinna and ear canal. Pinna is made up of tough cartilage which is covered by skin. The main function of the pinna is to gather sounds and to move them to the ear canal. Eardrum serves as the pathway that leads to the middle ear.
Middle ear consists of eardrum that separates them from the outer ear. When sound waves hits the eardrum, it vibrates with the frequency of the received sound.
The inner ear changes the vibrations coming from the middle ear to the nerve signals. The inner ear consist of cochlear and semicircular canal.
The cochlea changes the vibrational signal into nerve signals that travels to the brain through the auditory nerve. The function of semicircular canal is to maintain the body balance.
Learn more:
1. Learn more about ear brainly.com/question/947478
2. Learn more about hormones brainly.com/question/892851
3. Learn more about vessels brainly.com/question/2909254
Answer Details:
Grade: Middle school
Subject: Biology
Chapter: Sensory organs
Keywords:
Sensory organ, ear drum, outer ear, inner ear, middle ear, ear canal, pinna, nerve signal, cochlea, semicircular canal, brain, ear, auditory nerve.
A)a hypotonic solution; into the cell
B)a isotonic solution; neither in nor out of the cell
C)a hypertonic solution; into the cell
D) a hypertonic solution; out of the cell
The answer is c, hypertonic solution, into the cell.