the first answer as blood needs to be oxygenated to be passes round the body then when its deoxgenated it will return to the heart to be pumped around the body again
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<span>S phase is the duplication of the cells genetic information, if this did not occur, when the cell divides into two cells, there would be no copy of this genetic information given to 1 out of the 2 cells.
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Cellular respiration depends on two chemical reactants; glucose and oxygen. Glucose and oxygen are made available to plants and animals for cellular respiration thanks to photosynthesis. Photosynthesis is the chemical reaction that uses solar energy to convert water and carbon dioxide into glucose and oxygen. Without photosynthesis, the available glucose and oxygen on the planet would quickly deplete to the point that life could not be sustained on Earth.
Answer:
Codominant and multiple alleles
Explanation:
Human blood types are an example of codominance, because both A and B alleles are expressed equally.
It cannot be complete dominance because neither the A or B allele are expressed over the other. I.e., neither are recessive.
It is not polygenic, as A B and O are multiple alleles of the same gene. Polygenic is when several genes control one trait. Therefore, it also represents a case of multiple alleles.
Sex linked traits are those present on the X chromosome, and we are told here that the gene is found on chromosome 9. Therefore it cannot be sex linked.
Incomplete dominance and codominance are similar but have different outcomes. instead of both alleles being expressed as in codominance, the resulting heterozygous phenotype is a 'blended' phenotype that is distinct from either homozygote. E.g. a red flower mated with a white flower producing pink flowers
