Lancaster County, Pennsylvania was first settled by a small number of Amish people in the early 1700's. The population has grown to over 85,000 individuals today, with most reproduction occurring within the group. Maple syrup urine disease affects only about 1 in 225.000 newborns in the U.S., but it affects 1 in 400 newborns in Lancaster. This high incidence of maple syrup urine disease in Lancaster probably reflects which phenomenon?

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Q: why do populations of sardinian villagers have different pv92+/-Alu allele frequencies?

A: geographic distances between villages shows a rapid decline of kinship with increasing distance but…

Q: In a population, 12% of the babies are born with sickle-cell anaemia. What is the frequency of the…

A: According to Hardy and Weinberg Equilibrium , the population remains unity if Mutation , selection ,…

Q: What is the most likely genotype of the affected panthers that died from the respiratory infection?…

A: Answer: HARDY-WEINBERG PRINCIPLE is the principle which states that  genetic variation within the…

Q: What is the genotype frequency of the dominan phenotype in this population? Sperm A(p 0.6) a(q =…

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A: Introduction Huntington disease is a degenerative brain disease that generates uncontrolled…

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Q: Why does sickle-cell anaemia persist in the human population when it is believed that the harmful…

A: The genes are the hereditary unit of an organism which are passed on from the parental generation to…

Q: 1. Semelparous life history 2. Iterous species 3. Senescence 4. Antagonistic pleiotropy 5. Carrying…

A: here we need to give definition of various Semelparous and Iteroparous Life histories. Living…

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Q: Describe how an individual’s genotype influences their chance of contracting malaria: which…

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Q: Sexual reproduction introduces new alleles to a population. True False

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Q: The chart shown below indicates the recurrence rates for three diseases (called diseases A, B and C)…

A: Genome-wide association study (GWAS) is a study method used to find genetic variations statistically…

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Q: The term Asian American refers to people of Asian descent who trace their roots to more than 20…

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Q: Changes in allelic frequency that leads to novel populations is an example of

A: Changes in allelic frequency that leads to novel populations is an example of microevolution.

Q: Which of the following is TRUE of the relationship between sickle cell anemia and malaria? Choose…

A: Sickle Cell Anemia - It is an inherited or genetic disease, in which the body no longer have enough…

Q: When only a few individuals survive unfavorable times, thereby losing a majority of genotypes in the…

A: A group of individuals of same species residing in same area is called as population. Allele…

Q: Describe how an individual's genotype influences their chance of contracting malaria: Which…

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Q: constant due to the metabolic costs of DDT utilization b) Natural selection favors DDT-resistant…

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Q: Consider a locus with two alleles (b1 and b2) in a population of bacteria (bacteria are haploid).…

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Q: Explain where, in the world, the Hbs allele is mostly likely to be prevalent and why the allele…

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Q: It is said,that the harmfull alleles get eliminated from population over a period of time,yet sickle…

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Q: A new viral disease shows up in human populations, and it appears that the survival rates of those…

A: Virals diseases are the common pathogens which cause illness to human body. They are easily spread…

Q: Why has natural selection not eliminated sickle – cell anaemia?

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Q: Why is it not safe to release transgenic salmon into the wild?

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Q: Assume in a population, there is a rare disease that affects 1/10,000 births. What is the frequency…

A: The Hardy-Weinberg equilibrium is based on the principle that the genetic variation in a population…

Q: Which of these statements regarding populations is/are true?

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Q: The pesticide DDT was widely used in the 1940s as a method of insect control. In the late 1950s the…

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Q: Vaccinating 65% of a population will provide herd immunity for a disease with which of the following…

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Q: effect of malaria on the frequency of the HbS allele in areas where malaria is common:In areas with…

A:

Q: In a certain African population, 4% of the population is born with sickle cell anemia (aa).…

A: p2 + 2pq + q2 = 1 and p + q = 1 p = frequency of the dominant allele in the population q = frequency…

Q: In humans, people with at least one dominant RhD allele have a Rh positive blood type. People with a…

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Q: Explain what is happening to the population at points A, B, C, and D in the following diagram. D…

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A: BASIC INFORMATION EVOLUTION The theory of evolution was first given by the Jean Baptist de Lamark.…

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.