Consider the following dihybrid testcross: B/b • E/e  ×  b/b • e/e For the progeny from this testcross, determine the relative proportions (from 0% to 100%) of each genotype if the two genes:

Q: Calculate the probability of either all-dominant or all-recessive genotypes for the alleles A, B, E,…

A: For each gene pair, the probability of getting a homozygous dominant genotype (e.g., AABB) is 1/4…

Q: In Drosophila,, the curled mutation (cu, chromosome 3, position 50.0) results in wings that curl up,…

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

Q: A series of three-point testcrosses is made to determine the genetic map order of seven linked…

A: An allele is a genetic variant, which is expressed as A (capitalized) when the trait is dominant and…

Q: Using the forked-line, or branch diagram, method, determine the genotypic and phenotypic ratios of…

A: The cross between two individuals which are heterozygous for three different traits is called a…

Q: The following pedigree follows the inheritance pattern of sickle cell anemia (b) in a family. What…

A: Sickle cell anaemia is an autosomal recessive disorder. This means that 2 mutated alleles should be…

Q: This pedigree consist of cystic fibrosis that is an inherited disease caused by f a recessive…

A: Cystic fibrosis is a genetic disorder in which the gene that produces the cystic fibrosis…

Q: In mice, the allele C for colored fur is dominant over the allele c for white fur, and the allele V…

A: A) Parents Genotype should be (CC,Vv) and (cc,VV).Mating has occured between a normal colored mice…

Q: A, B and C are three linked genes,  A and B are separated by 40 cM and B and C are separated by 30…

A: Two linked genes have a certain “rate of concurrence” of recombination between them. This is known…

Q: A large ear of corn has a total of 433 grains, including 271 purple & smooth, 73 purple &…

A: The objective of this question is to determine if the observed phenotypic ratio in the corn grains…

Q: 1) Imagine you discover a new mutant strain of tailless mice. Upon looking closer, you notice that I…

A: A test cross is defined as the method to explore the organism's genotype. Thus, it is an…

Q: Miniature wings (Xm) in Drosophila result from an X-linked allele that is recessive to the allele…

A: Alleles are the alternative forms of a gene. Allele can be dominant or recessive.

Q: For each cross below, type in the expected phenotypic ration among the progeny:   Monohybrid cross…

A: The genes are the primary hereditary unit of life. DNA codes for the phenotypic traits in an…

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: • Consider the selfed offspring of a AaBbCcDd individual: •What is the probability that offspring…

A: An organism's genotype, or the collection of alleles it contains for a certain trait, is referred to…

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

A: In the given case, let the dominant allele associated with ADHL disease be “A” and the allele…

Q: Earlobe attachment is controlled by a single gene.  The free (F) condition is dominant over the…

A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…

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: The F1 from a cross of AABB x aabb is testcrossed, resulting in the following phenotypic ratios: AB…

A: 3) RF= (recombinants/ total)*100 =(190+210)/(308+190+292+210) =40% 1) the genotype for the given…

Q: Consider the following cross examining four gene in two parental lines: Parent 1: A/a; B/b; D/d; e/e…

A: Product rule is used to determine the overall probability. The product of probability of two…

Q: A fly that is heterozygous at 3 different, independent, autosomal loci (AaBbCc) is crossed to an…

A: The genotype is defined as the genetic constitution or composition of an individual. Thus, it is the…

Q: Three genes yellow (y) white (w) and cut (ct) are under investigation for possible linkage on the X…

A: If the genes are located on the chromosome then they are classified as linked genes. In this…

Q: Consider the following genotype: ● ● ● (P1) A/a BC/bc_D/d E/e FgH/fGh X (P2) A/a BC/bc D/d E/e…

A: Recombination is a process that produces gametes with allele combinations that weren't present in…

Q: ● ● ● 4.1 3. /1/17 Consider the selfed offspring of a AaBbCcDd individual: What is the probability…

A: In the given question, we are given the genotype of the F1 individual that is AaBbCcDd. In F2…

Q: Two corn plants heterozygous for purple and smooth kernels are crossed. What is the chi-squared…

A: A dihybrid cross between two corm plant heterozygous for purple and smooth kernels are crosses.…

Q: Consider three genes L, U, and W, for which the count of F2 phenotypes after a 3-point cross is as…

A: The parent gametes would be having the highest frequency thus they are IUW and Luw. The gametes…

Q: What are the expected phenotypic ratios from the following cross:Tt Rr yy Aa × Tt rr YY Aa, where T…

A: By applying multiplication method,   Tt Rr yy Aa x Tt rr YY Aa So, for height (Tt x Tt) the…

Q: Yellow guinea pigs crossed with white ones always produce cream-colored offspring. Two cream guinea…

A: Given that Yellow guinea pig was crossed with white one.  Thus cross will always produce cream…

Q: Give the phenotypic and genotypic ratio of the following testcrosses of dihybrids:

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

Q: Gene “A” and gene “B” are not linked. Each has two alleles. The A allele is dominant over the a…

A: In this question, we are given with two genes A and B. These genes are such that allele A is…

Q: Consider the following cross examining four gene in two parental line: Parent 1: A/a; B/B; D/d; E/e…

A: This is a tetrahybrid cross, meaning a cross involving study of four different genes. The number of…

Q: The A & B antigens in humans may be found in water-soluble forms in secretions, including saliva of…

A: Antigens are generated in the human body by the allelic activity of the A, B, and O group loci in…

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: Two corn plants are studied. One is resistant (R) and the other is susceptible (S) to a certain…

A: Plant pathogenic fungi produce extremely poisonous toxins called mycotoxins in plant seeds infected…

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.