Albinism is inherited as a recessive trait in humans. If the parents are both  heterozygous for the trait, what is the probability of obtaining the following:  a. 3 albino children?  b. 2 normal girls?  c. 4 albino boys?  d. first 4 children will be normal and the last 2 children will be albino? e. 4 normal children and 2 albinos in any order?

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: Assume that attached earlobes is an autosomal recessive trait with 47% penetrance. If one parent is…

A: The attached earlobes are not rare, but they are also not common. Earlobes of this type are small…

Q: Deafness is often inherited in humans as an autosomal recessive trait. Assume that this is the case…

A: BASIC INFORMATION  AUTOSOMAL RECESSIVE DISORDER - it means that the trait will be present on the…

Q: Hemophilia is a disease caused by a gene found on the X chromosome. Therefore, it is a sex-linked…

A: If the woman  gets the X chromosome with the hemophilia gene, she will have hemophilia . A man who…

Q: For the pedigree shown here, the disorder is caused by a recessive (g) autosomal allele. Label each…

A: A tree made of lines and symbols representing the genetic history of person's family is known as a…

Q: Questions a to e are answerable by yes or no. Indicate the possible parental genotypes if your…

A: A genotype is an individual's collection of genes. The term can refer to the two alleles for each…

Q: If a genetic disease is inherited as an autosomal recessive, one would expect to find which of the…

A:

Q: Fruit flies are very useful model organisms that have been used to study genetics. One mutant…

A: An eyeless fruit fly is represented by ey gene which is a recessive gene. Homozygous normal fly is…

Q: A man who is an achondroplastic dwarf with normal vision marries a color- blind woman of normal…

A: "Inheritance" is the process through which a child gets genetic information from his or her parents.…

Q: Both of Ruth's parents have a round face, a dominant trait. Ruth, however, was born with a square…

A: Introduction  A trait is a specific characteristic or feature that is inherited genetically or…

Q: When one examines the pattern of inheritance of a deleterious gene and finds that it appears in…

A: Introduction Chromosomes are thread-like structures found within the nucleus of both animal and…

Q: 3) Suppose that an allele, b, of a sex-linked gene, is recessive and lethal. A man marries a woman…

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

Q: A woman and her spouse both show the normal phenotype for pigmentation, but both had one parent who…

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

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A: Colourblindness is X linked recessive condition in which recessive allele h is present on X…

Q: The achoo syndrome (sneezing in response to bright light) and trembling chin (triggered by anxiety)…

A: Since human cells Carry 2 sets of chromosomes having same set of genes.  So these 2 version of genes…

Q: If a mouse has a dominant phenotype (P_), how would you determine if it is homozygous (PP) or…

A: Each gene coding for a specific trait has two alternative forms called alleles. These alleles can be…

Q: Retinitis pigmentosa, a form of blindness in man, maybe caused either by a dominant autosomal gene…

A: Given that, there are two genes which control retinitis pigmentosa. It can be caused by dominant R…

Q: In the following pedigree, is the disorder’s mode of inheritanceautosomal dominant, autosomal…

A: In this pedigree, affected individuals appear in every generation. There are no carriers shown in…

Q: In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in…

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

Q: 3. You are studying a genetic disorder characterized by progressive blindness. You find two families…

A: The alleles are generally of dominant and recessive type and some other forms like codominant are…

Q: In man, the allele for normal color (A) is dominant to the allele for albinism (a). A normal man…

A: Introduction :  Albinusm is an autosomal recessive disorder in which there is reduced or absent…

Q: that follows Mendelian rules of inheritance, what is the only way an organism can have the recessive…

A: Mendel explained his results by describing two laws of inheritance that introduced the idea of…

Q: I. II. III. 1 1 2 2 ? 3 3 In the pedigree above, there could be carriers that are not marked. For…

A: PEDIGREE ANALYSIS: The analysis of the diagram or chart that represents a family's genetic history…

Q: What are the genotypes of the mother and father in the pedigree below? The pedigree shows albinism…

A: The autosomal recessive is of the ways through which many traits, diseases, and disorders can be…

Q: Trait W is found in the individuals represented by the shaded symbols in the following pedigree.…

A: Pedigrees are used to investigate the pattern of inheritance of a particular trait through…

Q: 6) What is the proposed mechanism of inheritance? a. autosomal recessive b. autosomal dominant c.…

A: A pedigree is a pictorial representation of a family history, essentially a family tree that…

Q: When phenylalanine is converted to phenylpyruvic acid, this molecule accumulates in the body and…

A: For this we will use binomial expression  P = n!/ x! (n-x!) * pxq(n-x)

Q: In horses, there are three coat colour patterns called cremello (beige/light brown), chestnut…

A: A gene is a unit of hereditary present in thousands on the strands of DNA(deoxyribonucleic acid).…

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: Two parents, both with blood type A, have three children in a row with blood type O. a. Is this…

A: There are four different blood types in the ABO Blood Group System: A, B, AB, and O. Each of these…

Q: While studying of the family tree with history of hypertrichosis (hyper hirsutism of the ear) this…

A: Introduction :- Hypertrichosis, which can affect both men and women, is described as excessive hair…

Q: Without referring to the notation used to write the genotypes, how are you able to tell that a gene…

A: All these are defined by the Alleles they inherit and the type of phenotype they show  These can be…

Q: Albinism is an autosomal (not sex-linked) recessive trait. What is the probability that, out of 3…

A: Albinism is an autosomal recessive trait. Most often, the parents of an individual with an autosomal…

Q: In humans, potential or expecting parents can be tested for the presence of the allele for the…

A: Cystic fibrosis is a hereditary disease that affects the lungs and digestive system. The body…

Q: Which of the following is the correct pairing of phenotype and genotype of Individual 5 in the…

A: The genes are hereditary units, which exist in two versions that are dominant or recessive, together…

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: Based on the pedigree shown here for a trait determined by a single gene (affected individuals are…

A: Introduction  Pedigree Analysis: this is the new approach to study the inheritance pattern in the…

Q: A woman with a rare autosomal recessive disorder was told that it was unlikely that her children…

A: The alleles are generally of dominant and recessive type and some other forms like codominant are…

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.