Question

Phenylketonuria is a heritable condition in humans characterized by inability to metabolize the amino acid phenylalanine because of failure to produce the enzyme phenylalanine hydroxylase. Among other symptoms. PKUs develop such severe mental retardation that they almost never reproduce. Phenylketonuria children are born to parent who are not phenylketonuria. In as much as Phenylketonuria so rarely reproduce, why does such a disadvantagous gene persist in the population?

Expert Answer

1 Rating

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Biology

Genetics

Related Biology Q&A

Find answers to questions asked by students like you.

Q: Where in the spinal cord would you find myelinated axons?

A: The spinal cord along with the brain is part of the central nervous system. It has myelinated axons ...

Q: In a cross between fair skin, black hair (heterozygous for all these traits) with brown skin, red ha...

A: A genetic trait is considered dominant if it is expressed in a person even in its single copy. While...

Q: Mendel crossed peas having round seeds and yellow cotyledons (seed leaves) with peas having wrinkled...

A: Mendel experimented with the inheritance of traits in pea plants, by controlling pollination he was ...

Q: What characteristic shapes can bacteria assume? Describe the ways in which bacterial cells cluster t...

A: Answer- All different types of bacteria comes under kingdom - Monera. Bacterias are unicellular prok...

Q: MSA is a selective medium and contains a higher salt concentration, a pH indicator and Mannitol suga...

A: Mannitol Salt Agar (MSA) is used as a selective and differential medium for the isolation and identi...

Q: What are three processes that cause nitrogen fixation?

A: BASIC INFORMATION  NITROGEN FIXATION  it is the process in which the nitrogen (N2) is converted int...

Q: A ______ degree burn typically involves the epidermis and part of the dermis. The subcutaneous layer...

A: The skin comprises of two layers that are the epidermis and the dermis. Underneath the dermis lies t...

Q: All the cells of one organism share the same genome. However, during development, some cells develop...

A: Developmental biology and stem cell biology helps us to understand more about the fate of cells. The...

Q: Which muscle type consists of long, cylindrical, striated fibers with multiple nuclei located at the...

A: Muscles cells are elongated and large in size. So they are called muscle fibres. The movement of bod...

Q: shortly answer a,b and c   following questions are related to action potentials in axons: a. What is...

A: Action potential :- Is defined as a sudden, fast, transitory change of the resting membrane potentia...

Q: Which tissue contains a calcified ground substance and is specialized for structural support?

A: The connective tissue is one of the primary tissues that is distributed throughout the body. Fibers,...

Q: Explain the significance of cleavage lines.

A: A bone is a rigid organ that comprises part of the vertebrate skeleton in creatures. Bones ensure th...

Q: 2)After the cretaceous extinction event mamals diversified very rapidly into many different new spec...

A: In biology, evolution means the change in the characteristics of a species over several generations ...

Q: What molecule catalyzes the formation of proteins? a.) tRNA b.) ribsomal proteins c.) rRNA

A: The protein synthesis process is a process where amino acids are formed by reading the frame of the ...

Q: How do we know that DNA replication occurs during interphase, not early in mitosis?

A: Introduction  A normal cell can divide by two process one is Mitotic cell division while the second ...

Q: To measure the population of lake trout in a 250-hectare lake, 100 individuals were netted and marke...

A: P = (N1 x N2)/ RP = total size of populationN1 = size of first sample ( marked)N2 = size of second s...

Q: A young man in his 20s has a heart attack and is rushed to the hospital. Blood is drawn, and his cho...

A: Simple diffusion – the molecules of gases such as oxygen and carbon dioxide are tiny enough to pass ...

Q: Which compartment of the eukaryotic mitochondrion is responsible for the formation of NADH, and FADH...

A: BASIC INFORMATION ABOUT THE FORMATION PYRUVATE  :-  it  forms in a series of steps  this process is...

Q: Describe the experiment done by Frederick Griffith in 1928, where the non-lethal (rough) strain of S...

A: Frederick Griffith  was a British bacteriologist.He was a physician, pathologist and a bacteriologis...

Q: microbiology: Aseptic Culture Techniques Lab Explain why a loop or needle is flamed before it is di...

A: The process of introducing a microorganism in a plate or a tube containing culture media is called i...

Q: 3. You have assembled a very short contig below, but you don’t know if this is the sense or antisens...

A: Gene is the segment of DNA (deoxyribonucleic acid) that is responsible for heredity and inheritance ...

Q: During oogenesis in an animal species with a haploid number of 6, one dyad undergoes nondisjunction ...

A: Introduction oogenesis is the production or development of an ovum .Oogenesis is that the method of ...

Q: Distinguish between (a) unidirectional and bidirectional synthesis, and (b) continuous and discontin...

A: Answer- DNA replication or synthesis of DNA is the formation of DNA from the parental strand in the ...

Q: When is the RSBI measurement taken?

A: BASIC INFORMATION  RSBI it stands for Rapid shallow breathing index it is basically the ratio of th...

Q: How do we know whether an organism expressing a dominant trait is homozygous or heterozygous?

A: Genetics is a branch of the biology involved in the study of genes, genetic variation, and heredity ...

Q: Recombination is a major mechanism by which coronaviruses (and other viruses) evolve, which must be ...

A: Recombination is the process by which two homologous sets of chromosomes exchange DNA between each o...

Q: QUESTION 5.  The pedigree below follows the appearance of a rare autosomal dominant condition result...

A: Penetrance refers to the proportion of people with a particular genetic change or a diseased conditi...

Q: What are the benefits and harmful effects of microorganisms?

A: Microorganism cannot be seen with naked eyes as they are so small. They can be seen under microscope...

Q: Why should small islands that are distant from a mainland have fewer plant species than large island...

A: A patch is a landscape or a place which contains all the necessary food supplements for a group of m...

Q: Black fur in mice (B) is dominant to brown fur (b).  Short tails (T) is dominant to long tails (t). ...

A: Mendel studied the transfer of two traits, which are called a dihybrid cross. The dihybrid cross inv...

Q: A) Define the coelom and 1. describe its function. B) Give examples of an animal phyla that exhibit ...

A: According to guidelines we have to answer the first question only. so please kindly post the remaini...

Q: In rats, the following genotypes of two independently assorting autosomal genes determine coat color...

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts fo...