A sickle cell allele is potentially fatal, yet Why not? Alleles always interact,

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A sickle cell allele is potentially fatal, yet Why not? Alleles always interact, so not all sickle cell genes are fatal. Some people live with the disease. It isn't fatal if you have one just one It is all bad. It isn't fatal if you have just one sickle cell allele and in that case offers resistance to lots of other diseases. Amino acids linked together fold into that are chemically stable, to the proteins they make up have particular shapes. Why does this It actually doesn't matter because the body can fix its own proteins, so they can do their job. If the proteins aren't the right shape, DNA can't If the proteins aren't the right shape, they don't fit down blood vessels. If the proteins aren't the right shape, they can't do their job properly. Various forms of the same gene are called alleles. genotypes somatic. recessive. DNA replication is a _____ process. noncomplementary semiconservative semisynthetic mutational What are two reasons the uncontrolled cell growth of cancer can cause serious health consequences? Both tumors and all those extra cells dying in the body can interfere with organ function. Cancers can become invasive and spread anywhere in the body, and cancerous cells normal cells. Cancerous cells attack normal cells and tumors can grow very large, interfering with organ function. Tumors can grow very large, interfering with organ and body function, and cancer can become invasive, spreading around the body, making it difficult to remove. Siamese cats have enzymes that code for dark fur color but are temperatures. Thus, the tips of a Siamese cat's ears, feet, and tail are dark but not the warmer regions of its body core. This is an example of pleiotropic. environmental effects. epistasis. incomplete dominance.

Explanation / Answer

Ans 9 B

Sickle cell anemia is a condition characterised by the presence of an abnormal allele for the hemoglobin beta gene. An heterozygous person does not develop as many as symptoms as homozygous affected person does as the earlier produces both normal and abnormal hemoglobin. The abnormal hemoglobin causes the RBC to aquire sickle shape in low pressures of oxygen. These heterozygous people have selective advantage in the places where malaria is present. So its not all bad.

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