An individual named Pat with Prader-Willi syndrome produced anoffspring named Lee with Angelman syndrome. The other parentdoes not have either syndrome. How might this occur? What are thesexes of Pat and Lee?

Q: are the gene pairs in non allelic interaaction, recessive epistasis independently segragating?

A: Gene interaction: When two or more non-allelic genes influence the outcome of a single trait this is…

Q: Could a man with an AB blood type be the father of an O child ?Could a man with an O blood type be…

A: According to the question, we have to explain that could a  man with an AB blood type be the father…

Q: A man with the II (A) blood group and a woman with the III (B) blood group in the AB0 system have…

A: The alleles are the alternative forms of a gene that are located on the same locus of a homologous…

Q: What is a varicosity

A: Varicosity is a dilated vein that mostly develops in legs.  The role of our veins is  to carry blood…

Q: What do monohybrid crosses reveal?

A: A cross that involves single pair of contrasting characters is known as Monohybrid cross.

Q: Is Miller Fisher syndrome hereditary?

A: Miller Fischer syndrome is a rare acquired nerve disorder that is characterized by abnormal muscle…

Q: Hemophilia A is transmitted by an X-linked recessive gene.With an affected father, what is the…

A: Answer: Introduction: In X-linked recessive disorders, an affected father has a mutation in a gene…

Q: How can you explain that not all Down syndrome cases are due to nondisjunction?

A: The syndrome can be analyzed as per the clinical signs and side effects that are associated with one…

Q: In humans, six fingers (F) is dominant to five fingers (f). Assume both parents are heterozygous for…

A: The presence of 6 fingers is dominant over the presence of 5 fingers.

Q: Both members of a couple know that they are carriers of the cysticfibrosis allele. None of their…

A: Cystic fibrosis is an inheritable disease that affects the mucous and sweat glands. If each parent…

Q: What is the karyotypefound in Down syndrome?

A: During the most recent years, Down disorder has been the focal point of uncommon consideration. Down…

Q: what is the probability that he might be a carrier of the recessive gene?

A: Cystic fibrosis is associated with the CFTR gene that encodes a protein that helps thin the mucous…

Q: The allele for baldness is on the X chromosome only. Can any sons obtain theallele for baldness from…

A: A critical baldness gene is found on the X chromosomes. This suggests that the probability of…

Q: what is Nullisomy?

A: Each cell in the body contains the 23 pairs of chromosome or total of 46 chromosome, half of which…

Q: explain the Phenotypic effects of duplications

A: Duplication of chromosome refers to an addition of an extra chromosomal arm attached to a…

Q: People with trisomy 21 develop Down’s syndrome. What law of Mendelian inheritance is violated in…

A: A gene is the fundamental physical and useful unit of heredity. Genes are comprised of DNA. A few…

Q: In humans, brown eyes (B) are dominant over blue. A brown eyed man marries a blue-eyed (b) woman and…

A: The phenotype of an individual is determined by his or her genotype. The genotype is determined by…

Q: Why can a person carrying a translocation be normal except for theinability to have children?

A: Translocation is a hereditary change were a piece of one chromosome servers and connects to another…

Q: A woman with achondroplasia (a dominant form of dwarfism) anda phenotypically unaffected man have…

A: On the basis of the given conditions, we can assume that there are 50 percent chances of the…

Q: Are all froms of Down Syndrome due to non-disjunction?  Explain

A: There are three forms of Down's Syndrome- 1. Trisomy 21 2. Non-disjunction 3. Mosaicism

Q: Why do most cases of Down syndrome originate from the mother? And how is this linked to maternal age…

A: Down syndrome also called "trisomy 21" is a condition in which a child is born having an additional…

Q: If a father has Marfan syndrome, a dominant disorder, and passes it down to all of his children, but…

A: The skeleton, blood vessels, heart, and eyes are all impacted by Marfan syndrome. Marfan syndrome…

Q: The mutant FMR-1 allele that causes fragile X syndrome is considered to be X-linked dominant…

A: Fragile X syndrome is a genetic disorder. It causes various developmental disorders that include…

Q: Wilma and Wally have one male child who has been diagnosed withDuchenne muscular dystrophy, an…

A: Duchenne muscular dystrophy is a medical condition of muscular dystrophy which is caused by DMD gene…

Q: A pea plant that is dwarf with green, wrinkled seeds was crossedto a true-breeding plant that is…

A: A trihybrid cross is a cross in which three characters of a plant is observed in a species.…

Q: From this pedigree is it dominant or recessive. Is ur autosomal or sex-linked?

A: Pedigree is define a diagrammatic representation of the individuals of a family for a particular…

Q: Why must the carrier of a genetic disease be heterozygous?

A: Homozygous means a person carries two identical pair of the gene whereas heterozygous means the…

Q: 1a) Explain one autosomal pattern of Mendelian inheritance. 1b) Describe one example of a disorder…

A: 1 a) Mendelian inheritance  Mendelian inheritance is defined as the inheritance pattern, which…

Q: Explain allelic series. The C-gene expression (Full color, Chinchilla, Himalayan, Albino) with…

A: The interaction of alleles has a very significant role in determining the phenotype of an…

Q: Explain the concept of mendal's law of inheritence?

A: Gregor Mendel conducted experiments on pea plant (Pisum sativum) demonstrating the inheritance of…

Q: A man has attached earlobes, whereas his wife has freeearlobes. Their first child, a boy, has…

A: Genetics is a tricky affair. It is the study of pattern of inheritance of the of traits from the…

Q: What is incomplete penetrance and what causes it?

A: Introduction  Any gene have two alleles pairs viz. Dominant or Recessive. The allele which gets…

Q: Ragweed hay fever (R) is dominant to the lack of allergy (r). A man who doesn’t suffer from ragweed…

A: Given: Ragweed hay fever (R) is dominant to the lack of allergy (r). Man - rr woman - Rr (Her mother…

Q: Is it possible for an unaffected female to havefemale offspring with red–green color blindness?

A: When the mutation is on the gene of the X chromosome, it is called the X-linked inheritance. As…

Q: Acatalasia is caused by a rare autosomal recessive gene. In heterozygous condition catalase activity…

A: Acatelasia is a genetically inherited disorder that causes lowering or absence of production of the…

Q: in the the dihybrid cross of Mendel how many genotype and phenotype?

A: Mendel's law of independent assortment states that the alleles of two (or more) different genes get…

Q: What feature(s) of this pedigree indicate(s) X-linked recessive inheritance?

A: The pedigree is the family tree diagram used to represent the pattern of inheritance in the family.…

Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.