A man and woman are both heterozygous for the recessive allele that causes cystic fibrosis. What is the probability that their first two offspring will have the disorder?

Q: Farmer Brown had two hogs, Olga and Hank.  Olga and Hank were normal, healthy hogs, but whenever…

A: Ogla and Hank must be both heterozygous for the condition. That is why they are producing some…

Q: a) X³ X5 X²Y A Figure 1 Name the pattern of inheritance in figure 1.

A: A pedigree chart illustrates a family's genetic history in graphical form by demonstrating the…

Q: A woman homozygous dominant for albinism marries a man who is homozygous recessive for albinism.…

A: Albinism is an autosomal recessive disease. In albinism, deficiency of tyrosinase enzyme occurs due…

Q: Inigo Montoya is healthy but his mother had the recessive condition, cystic fibrosis, which is…

A: Cystic fibrosis is a disease that is inherited in an autosomal recessive manner. An affected…

Q: Cystic fibrosis is a genetic disorder that results in the build-up of thick mucus in the lungs and…

A: Cystic fibrosis is a genetic disease caused by abnormalities in the CFTR gene. As a result, an…

Q: Two affected daughters and two normal sons are born to an affected male and a normal female. Each of…

A: The pedigree analysis helps us identifying the mode of inheritance of a particular disease and it…

Q: Hemophilia is an X-linked recessive disorder and blood type is autosomal.  If two healthy parents,…

A: Introduction  X linked inheritance is based on the sex chromosome (X chromosome). This inheritance…

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: PKU is an inherited disease caused by a recessive allele. If a woman and her husband, who are both…

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

Q: Cystic fibrosis is a disease that is passed down through the generations. The recessive alleles for…

A: Genes carry the traits from one generation to another. Genes that code for different forms of a…

Q: In a multigenerational study of a family, 8% of the males and 8% of the females have red hair. What…

A: answer is  A. Autosomal inheritance

Q: Neurofibromatosis-1 (NF1) is an autosomal dominant disorder where tumours form in the base layer of…

A: The probability is 1/4

Q: Bryan has albinism, an autosomal recessive trait, which means he is homozygous recessive for…

A: Ans: Albainism is an autosomal recessive disorder. For this disease to develop two copies of an…

Q: The pedigree shown below shows the inheritance of cystic fibrosis, a disorder that causes severe…

A: Cystic fibrosis is an inherited disorder that causes extreme damage to the lungs, digestive system,…

Q: In humans, hemophilia is a sex-linked recessive disease, and the gene is located on the X…

A: Hemophilia is a sex-linked recessive disease. This means that in order to produce a diseased…

Q: Tay-Sachs disease is a recessive genetic disease. Two individuals, both of whom are heterozygous for…

A: Inheritance is the process of transmitting genes that encode a particular trait from parents to…

Q: dominant that is 80% penetrant. Clara inherited her polydactyly from her mother, her father had no…

A: 80% penetrant means that in spite of the presence of the dominant allele still 20% people would not…

Q: In humans, blue eyes are inherited as a recessive autosomal trait and color blindness is an X-linked…

A: The objective of this question is to determine the probability of this couple having a son with…

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: Hemophilia is a recessive sex-linked trait in humans.  Sickle-cell anemia is a recessive trait on an…

A: Hemophilia is X linked recessive disorder in which blood continuously flows because of absence of…

Q: A man has six digits on each hand and foot (an autosomal dominant trait).  His wife and first…

A: A condition in which an individual has more than 5 digits is known as polydactyly. Polydactyly is an…

Q: Johnny has unattached earlobes (a dominant trait) like his father, but his mother has attached…

A: Mendelian inheritance refers to the inheritance of traits controlled by a single gene with two…

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: Sickle cell anemia is inherited as an autosomal recessive condition. It also exhibits incomplete…

A: Sickle cell anemia (SCA) is a genetic disorder that occurs when an individual has two homozygous…

Q: Jan and Michael are both carriers for the cystic fibrosis allele. If Jan and Michael have five…

A: Introduction Cystic fibrosis (CF) is a genetic disorder, which means it is transferred from…

Q: Hemophilia is a disease caused by a recessive allele (h), which is found on the X chromosome,…

A: Given that, hemophillia is X-linked recessive disorder. Also, a normal man marries a woman that is…

Q: *Cystic fibrosis is a rare autosomal recessive condition. A phenotypically normal man whose father…

A: Mendel proposed three laws based on his research. His research provided a picture of the independent…

Q: Huntington's disease is caused by a autosomal dominant that is lethal in embryos in the homozygous…

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

Q: Epilepsy is a central nervous system (neurological) disorder in which brain activity becomes…

A: Epilepsy is a neurological disorder that usually affects the human central nervous system and is…

Q: A patient has two parents with Huntington's disease. They may not have inherited this autosomal…

A: Introduction   hen an embryo forms there will be an exchange of genetic information between the…

Q: a) Identify and describe 5 different types of genetic inheritance. (b) In humans,…

A: In human cells total of 46 chromosomes are present. Out of these 22 pairs are autosomes and 1 one…

Q: A man with blood type O (genotype ii) has a father with blood type A and a mother with blood type B.…

A: In human blood group typing, the ABO system of blood grouping is used.  The Blood groups are A, B,…

Q: Your brother has an autosomal recessive disorder, while you are unaffected. Neither one of your…

A: Question - Your brother has an autosomal recessive disorder, while you are unaffected. Neither one…

Q: Draw a Punnett square for a female who is a heterozygote and a male who is a dominant homozygotes.…

A: Genes are hereditary units in the DNA. These genes can be present in two versions called "dominant"…

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

A: Genotype - It is the genetic makeup of any individual. It gives information about exact genetic…

Q: hemophilia is a sex linked recessive disease. Dick does not have hemophilia. His wife Debi is a…

A: Hemophilia is a sex-linked recessive disease; it will only be expressed in a homozygous condition of…

Q: A boy with cystic fibrosis (a recessive disorder) is born to a couple who appear to be normal. What…

A: Cystic fibrosis is a hereditary, life-threatening disease that affects the lungs and digestive…

Q: recessive (aa) for the attached earlobe gene, what is the probability that their second child will…

A: Punnett square is considered a method that is used widely for the prediction of different genotypes…

Q: what is the probability that a couple (both heterozygous for the same recessive mutation) will have…

A: “Homozygous defect” takes place If the type of “deleterious mutation” is the same in both copies of…

Q: Jan and Michael are both carriers for the cystic fibrosis allele. If Jan and Michael have three…

A: Fraternal or dizygotic twins are produced when two different ova are fertilised by 2 different…

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.