A man with red-green color-blindness (a recessive, sex-linked condition) has a daughter of normal phenotype. She marries a man who is normal for the trait.  a. If we use G for the normal allele and g for the recessive allele and O for no allele (i.e. it is a Y chromosome), what are the following genotypes? Man – Daughter – Daughter’s husband –   b. What is the probability that a daughter of this mating will have color-blindness?   c. What is the probability that a son will have color blindness?   d. If the couple has four sons, what is the probability that all four will be born with color blindness?

Q: Red-green colour blindness is a sex-linked trait. Red-green colour blindness (Xrg) is the inability…

A: Color blindness occurs when you are unable to see colors in a normal way. It is also known as color…

Q: The gene for red-green colour vision is carried on the X chromosome. If the gene is faulty, colour…

A: Homozygous dominant is represented by both capital letters such as TT for tall.Heterozygous dominant…

Q: If an individual has the dominant phenotype for an x-linked trait, what is/are the possible…

A: The X linked traits are encoded by the genes present on the X chromosome. Whereas autosomal traits…

Q: The allele for albinism is recessive to the allele for normal skin pigmentation. All individuals who…

A: An inherited disorder that presents with little or no melanin production, which results in either…

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: In humans, normal skin color (A) is dominant over albino (a).  An albino man marries a normal woman…

A: Alleles are passed down to the organism's progeny. They come in two varieties: dominant alleles and…

Q: arts a) through c) below. ays written with the dominant gene first. Therefore, there a nd the father…

A: Sickel cell anaemia is an autosomal recessive. Nomal allele=S Sickle cell anaemia =s

Q: Colorblindness is inherited as an X-linked recessive trait while pattern baldness is controlled by…

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

Q: A female has a family history of Duchenne muscular dystrophy, a recessive sex- linked condition that…

A: Since, the disorder is sex linked recessive, we have,  Genotype of affected female - XDXD Genotype…

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: Identify the specific mode of inheritance. Gene C codes for colored feathers in chickens. A cross…

A: Inheritance parents can be categorized into four main types, autosomal dominant, autosomal…

Q: Greg and Susan have Nail- Patella syndrome (NPS). NPS is an autosomal dominant. Greg has a blood in…

A: Introduction  The nails, knees, elbows, and pelvis are abnormal in people with nail-patella…

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: A couple each with blood type AB and normal pigmentation have a child with AB blood type and…

A: Given: A couple each with blood type AB and normal pigmentation have a child with AB blood type and…

Q: an unaffected woman who is heterozygous for the x linked allele causing duchenne muscular dystrophy…

A: Inheritance is the process of transmitting the traits from parent to offspring. Traits of an…

Q: Color blindness in humans is controlled by an X-linked completely recessive allele (Xc), while…

A: Introduction :- Color blindness (colour vision deficit) is a condition in which a person's ability…

Q: Classical hemophilia is a sex-linked disease caused by a recessive gene on the X chromosome.…

A: Hemophilia is a X linked recessive trait.  Let X allele encodes normal phenotype. And it is dominant…

Q: In humans, cystic fibrosis and albinism are both inherited as independently assorting autosomal…

A: The law of independent assortment was first observed by Gregor Johann Mendel in 1865 during his…

Q: Albinism is a recessive disorder where there is a lack of melanin. Andrea and her husband Claude…

A: Given information Albinism is a recessive disorder.  Andrea and Claude both have normal skin…

Q: A woman with type A blood and a man with type B blood have a child with type O blood. Can this man…

A: Blood group is the type of blood we have depends on its genotype. There are 4 main blood groups –…

Q: Red-green colour blindness is a sex-linked trait. Red-green colour blindness (Xrg) is the inability…

A: A structure of colorblindness in which red and green are saw as indistinguishable. This is the most…

Q: Hemophilia is a X-linked genetic disorder causing blood clotting problem. A dominant allele on the X…

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

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 the Bombay phenotype, a homozygous recessive individual hh appears to have blood type O

A: Blood group in human beings is determined by ABO, Rh factor and Bombay phenotype.

Q: Skin color in humans is determined by polygenic inheritance, which means the more dominant alleles…

A: Polygenic inheritance: - in this inheritance, more than one genes control the single characteristic.…

Q: Assume that color blindness is a recessive character on the X chromosome. A man and woman with…

A: Introduction  Inheritance referred to the transmission of character/traits in the form of gene from…

Q: Red-green color blindness is an X-linked recessive disorder. If Allison is heterozygous (a carrier),…

A: The X-linked genes show a different pattern of inheritance in males and females. The male progeny…

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: Red-green colour blindness is a sex-linked trait. Red-green colour blindness (Xrg) is the inability…

A: Given: Red-green color blindness is a sex-linked trait. Red-green colour blindness (Xrg) is the…

Q: Cystic Fibrosis is an autosomal recessive disorder. A couple are both carriers of the recessive…

A: Cystic fibrosis is an inherited illness which affects the lungs and digestive system. The body…

Q: Piebaldism is a skin condition that causes an infant to be born with white birthmarks due to a…

A: It is an autosomal dominant genetic disorder. It is mainly due to the absence of melanocytes of the…

Q: A female has a family history of Duchenne muscular dystrophy, a recessive sex- linked condition that…

A: Sex linked recessive: 1. In case of sex linked recessive disease trait should skip generation. 2.…

Q: The allele for albinism ( c ) is recessive to the allele for normal pigmentation ( C ). A normally…

A: According to the question, The allele for albinism ( c ) is recessive to the allele for normal…

Q: Imagine a cross between a man and a woman having the following genotypes:    Genotype of the…

A: Dominant allele In genetics, it refers to the situation of one allele masking the affect of other…

Q: Consider the following scenario: A man without freckles (freckles are a dominant trait, determined…

A: Egg/Sperm fA fa fA fa FA FfAA (Freckles) FfAa (Freckles and carrier for CF) FfAA (Freckles) FfAa…

Q: Imagine a human trait that is inherited via genetic maternal effect and found on the X chromosome…

A: Introduction:        We know that maternal effect or cytoplasmic inheritance is not determined in an…

Q: The shape of a heliodor is an X-linked trait. Male heliodors inherit two X chromosomes, while the…

A: X-linked recessive traits are those inherited through sex chromosome X and expressed on homozygous…

Q: Consider a situation where you have a parental cross with the mother and father phenotypes listed…

A: In this case, data from a parental cross and later generations of children are provided to us. If an…

Q: What is the probability that a child will test as type A blood from parents with the following…

A: A cross is the mating between two individuals leading to the fusion of gametes and resulting in…

Q: A normal woman has a father who has red-green colour blindness. She had a child with a man who does…

A: Correct answer: (c) 0.25 Color blindness is a X- linked recessive disorder When we cross a normal…

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.