When examining the transmission of phenylketonuria (PKU), a recessive trait, we can clearly identify the <u>genotype </u>when a child is afflicted with PKU. For the child not afflicted with PKU, we can only identify the <u>phenotype</u>, as the child may or may not be a carrier.
An organism's genotype is its particular aggregate of alleles for a given gene. So, for example, in the pea plants above, the feasible genotypes for the flower-color gene were pink-purple, red-white, and white-white. The phenotype is the bodily manifestation of an organism's allellic combination (genotype).
Someone's genotype is their precise sequence of DNA. Greater specifically, this term is used to consult the two alleles someone has inherited for a selected gene. Phenotype is the detectable expression of this genotype – a patient's scientific presentation.
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Scientists often perform experiments to check and recheck their work. They also redo these experiments to ensure correct results.
Answer:
The correct answer is spirochete and cyanobacteria
Explanation:
The endosymbiotic theory states that the eukaryotic cells are evolved from prokaryotic cells when a larger prokaryotic cell engulfed the smaller prokaryotic cell. The presence of chloroplast and mitochondria supports this theory.
After genetic analysis of chloroplast DNA, it was seen that it closely resembles the cyanobacterial DNA which shows that ancestor host cell gained photosynthetic ability from endosymbiosis with a cyanobacterial ancestor.
It was also seen that ancestral host cells engulfed spiral bacteria called spirochetes which helped them to produce cilia for example tail on sperms is the result of endosymbiosis of spirochete. So the right answer is spirochete and cyanobacteria.
