Answer:
1. Character
2. Trait
3. Monohybrid cross
4. Alleles
5. Dominant allele
6. Recessive allele
7. Phenotype
8. Genotype
Explanation:
1. Character is an inherited feature passed through genes that varies in individual e.g flower colour
2. A trait is the variant form of a character e.g red and blue flower colour are variant forms of the flower colour character.
3. Monohybrid cross is a cross between two parents differing in only one character.
4. Allele is an alternate form of a gene e.g A and a alleles for gene A
5. Dominant allele is one of the allelic pair that expresses itself by masking the expression of the other allele in a heterozygous state.
6. A recessive allele is the allele that is masked or not expressed in a gene. It is covered up by the presence of the dominant allele.
7. Phenotype is the physical and visible trait of an organism e.g Tallness, colour
8. Genotype is the genetic constituent of an organism e.g AA, Aa etc.
Answer:
fully oxygenated blood returning to the amphibian heart can undergo additional pumping to reach higher pressures.
Explanation:
Fishes have a two-chambered heart with one atrium and one ventricle. The blood is pumped from the atrium into the ventricle. Ventricle pumps blood into a single circuit of blood vessels. Blood is oxygenated as it passes through capillaries in the gills. As blood circulates through the gill capillaries, it has low blood pressure and therefore, is delivered very slowly to the other organs.
The amphibian heart has two atria and one ventricle. A sinus venosus collects oxygen-poor blood and pumps it into the right atrium. Oxygenated blood from the lungs passes directly into the left atrium. The left atrium pumps the oxygen-rich blood into the arteries that conduct it to the various tissues of the body. Therefore, a three-chambered heart in reptiles allows the delivery of oxygenated blood with high blood pressure.
Answer:
The number of protons in the nucleus of an atom is equal to the atomic number
the number of electrons in a neutral atom is equal to the number of protons
Explanation:
Faciliated diffusion.
Both facilitated diffusion and simple diffusion do not require ATP; however, simple diffusion does not use transport proteins. Facilitated diffusion uses transport proteins which are carrier and channel
Answer:
Codominant- traits don’t have a clear dominant or recessive
incomplete dominance- the heterozygous condition shows a “blending” or a “middle” condition
Explanation:
In codominance, the traits are expressed equally in the phenotype thus they don't have a clear dominant or recessive state. For example the ABO blood group alleles. The alleles A and B are codominant each being expressed equally.
In incomplete dominance the traits show intermediate expression where one allele expresses itself more strongly than the other. An example in man is seen in the inheritance of the disease sickle cell anaemia. Heterozygote who carry the sickle cell gene are said to have sickle cell trait and as such the carrier allele (HBa) has a stronger influence on the phenotype than the dominant alle (HBs).
