Gene “A” and gene “B” are not linked. Each has two alleles. The A allele is dominant over the a allele and the B allele is dominant over the b allele. Answer the following questions about a dihybrid (two-trait) cross. A) List all of the possible gametes (eggs) that could be produced by an individual with the genotype: aabb B) List all of the possible gametes (sperm) that could be produced by an individual with the genotype: AaBB C) Fill out a Punnett square for the dihybrid cross cross between the two individuals listed above (aabb x AaBB). What percent of the offspring from this cross would have the dominant phenotype for both traits?

Q: ) What is the difference between a monohybrid cross and a dihybrid cross?   2) What does it mean…

A: Traits or characters can be defined as a characteristics of an organism. For example, qualitative…

Q: Gene A converts compound A (white) to compound B (blue). Gene B converts compound B to compound C…

A: Compound A→→→→→→→→ (white)                            Gene A Compound B→→→→→→→→ (Blue)…

Q: 3) Queen Victoria of England, who ruled from 1837-1901, is believed to have been the carrier of…

A: Hemophilia is a X linked recessive trait. The XH allele is dominant over Xh allele.

Q: For the below mating, what proportion of offspring will be blood type A? H/h; A/i* H/h; A/i A) 1/4…

A: Introduction  The classification of blood based on the presence or absence of antibodies and…

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

A: Achondroplastic dwarfism is an autosomal dominant inherited disorder which causes a type of…

Q: 1. For the following cross: Aa Bb cc Dd  x  Aa Bb CC Dd   what is the chance of obtaining an…

A: Introduction :  The study of genes and variations is referred to as genetics. It explains how traits…

Q: Explain why dead females are never found in the F1 generation no matter which parents are crossed.

A: Sex- linked traits: In an XY chromosomal system of sex determination ,both X and Y chromosomes are…

Q: A certain plant species has dominant red flower color (R) to the recessive white flower color (r). A…

A: Introduction Inheritance is the process of transmitting traits from parent to offspring. The traits…

Q: Consider the production of flower color in the Japanese morning glory (Pharbitis nil). Dominant…

A: Considering the flower color production in the Japanese morning glory (Pharbitis nil). Genotype for…

Q: Julie (a female) has hemophilia. Based on this information, what can we say about the genotypes of…

A: Introduction X-linked diseases are those that occur due to the presence of abnormal/ diseased…

Q: In beetles, an X-linked gene determines body size, with normal size (M)completely dominant to…

A: A genetic cross is an experimental breeding process performed to understand the patterns of…

Q: A color-blind man marries a woman with normal vision whose father was color-blind.  Remember that…

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

Q: Calico is a coat color found in cats, which is caused by a X-linked, co-dominant allele Female cats:…

A: Co-dominance is condition in which two alleles of the gene are equally dominant, hence are termed as…

Q: In a parental cross of a ADHL disease trait, where the father is affected and the mother is…

A: ADHL disease is a autosomal dominant trait

Q: A female with an aa bb cc dd genotype is crossed with a male with an Aa Bb Cc Dd genotype. What is…

A: To answer this question, convert the given tetrahybrid cross into 4 monohybrid crosses.

Q: ) Haemophilia is a serious medical condition where blot clots extremely slowly. A sex linked…

A: There are a few important points : In sex-linked recessive alleles most affected individuals are…

Q: An attached-X female fly, XXn Y (see the “Insights and Solutions”box), expresses the recessive…

A:

Q: Draw a Punnett square for the dihybrid cross. There are two known alleles of gene occupying a…

A: Dihybrid cross involves two genes in a cross. That's why the two traits are involved in this cross.

Q: In the pedigree below, male II-1 has Klinefelter syndrome, which is the result of an XXY karyotype.…

A: Klinefelters syndrome occurs when an abnormal XY sperm fertilizes a normal X egg, or a normal Y…

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: In humans, the allele for normal blood clotting, H, is dominant to the allele for hemophilia, h. The…

A: Hemophilia is an inherited condition of bleeding. Children with haemophilia cannot stop bleeding…

Q: 2) John is heterozygous for brown hair. His wife Jodi is homozygous for brown hair. What offspring…

A: Phenotypes are set of observable characteristics of an individual resulting from the interaction of…

Q: A homozygous recessive allele, aa, is responsible for albinism. Humans can exhibit this phenotype.…

A: Albinism is passed on in an autosomal recessive inheritance pattern. This means a child has to get 2…

Q: The genes for the eye-color of fruit flies are located in their X chromosome, or X – linked. (R…

A: According to the question, we have to answer the following questions -  The genes for the eye color…

Q: Duchenne Muscular Dystrophy (DMD) is a sex- linked, recessive disease in which a mutation in the…

A: Duchenne’s muscular dystrophy (DMD) is a muscular disorder that is typically inherited by the boys.…

Q: Fruit flies can have straight wings (S) or curly wings (s), and they can have be female XX or male…

A: S denoting for straight wings is a Dominant or wild type trait. And s denotes recessive trait for…

Q: In a cross between two, dihybrid, heterozygous individuals, what fraction of the offspring will be…

A: dihybrid organism is one that is heterozygous at two different genetic loci.

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: Hemophilia is a blood disorder which is sex-linked. A woman carrier has children with a normal man.…

A: In this question, we have to determine the chances for girls and boys with haemophilia .

Q: You are looking at the color of feathers in ducks and find that yellow ducks (Y) are dominant to…

A: When expression of a gene is dependent on the absence or presence of another gene, such condition is…

Q: In humans, the genes for red-green color blindness (R = normal, r = color blind) and hemophilia A (H…

A: Introduction :- A gene or group of genes that causes a single trait or disease is referred to as a…

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.