Seed color is controlled by 3 independently assorting bi-allelic genes (P, Q, R), such that homozygote pp exhibits recessive epistasis over the seed color pathway, converting a white pigment into yellow, which then becomes orange in the presence of a Q allele, or red in the presence of R. Individuals with both Q and R alleles show pink seeds. In a cross of PpQqRr individuals with ppqqrr individuals, what is the ratio of white-seeds to red seeds?

Q: In Drosophila, the sepia mutation (se, chromosome 3, position 26) results in dark brown eyes, while…

A: Introduction :- D. melanogaster is an ideal model organism due to a variety of characteristics. The…

Q: If an incompletely dominant red-flowered plant is crossed with an incompletely dominant…

A: Incomplete DominanceIn snapdragons, red flower color (R) is incompletely dominant over white flower…

Q: The production of eye-color pigment in Drosophila requires the dominant allele A. The dominant…

A: Inheritance is defined as the process by which genetic information will be passed or transmitted…

Q: You make a test cross between an F1 plant that is heterozygous for two dominant resistance genes (R1…

A: Linkage is the relation between the two genes on the same chromosome. Their relationship with each…

Q: A cross like this (between two individuals heterozygous for two traits) is often referred to as a…

A: A two-point cross includes two parents heterozygous for two different loci.

Q: In humans, four different blood types (A, B, AB, and O) are encoded by three alleles 1. I. and &…

A: Antibodies and antigens are types of blood proteins that vary from person to person. Antigens are…

Q: Explain at the biochemical or enzymatic level, the phenotypic consequences of alleles incase of…

A: This is the phenomenon called incomplete dominance which is usually seen in snapdragons. In the…

Q: In certain breeds of chicken, the appearance of the comb (a fleshy growth or crest on the top of the…

A: A trait is a characteristic feature that is unique to particular individual. Each trait is…

Q: In tomatoes, red fruit color (R) is dominant over yellow fruit color (r). Do the following crosses:…

A: Given: In tomatoes, red fruit color (R) is dominant  yellow fruit color (r) is recessive.

Q: A female hamster from a true-breeding big-eared strain was crossed to a male hamster from a…

A: In a genetic cross involving true-breeding hamster strains with varying ear size and whisker length,…

Q: milar pedigree. One of their daughters is colorblind. Give the genotypes of this nd paternal…

A: Colourbrindness is common hereditary disease. These diseases passed from parents. Mostly…

Q: A woman with blood type A, who is heterozygous for both blood type and Rhesus factor, had a child…

A: The Human Blood group is a classic example of multiple allelism and co-dominance. ABO blood type in…

Q: Construct a Punnett square using the dihybrid cross TtGg × TtGg. (TT, Tt codes for tall plants, tt…

A: Two laws of Mendel:- 1) Law of Segregation/ Law of purity of gametes- Monohybrid cross. 2) Law of…

Q: . A doubly-homozygous red-flowered plant is crossed with a doubly-homozygous white-flowered plant.…

A: Phenotype refers to the traits that can be observed physically such as height or color. So…

Q: In summer squash, white fruit color(W) is dominant over yellow fruit color(w). If a squash plant…

A: The trait is a character which we have inherited from our parents and then it will be passed to our…

Q: In a species of the cat family, eye colour can be gray, blue, green or brown, and each colour is…

A: Given:

Q: Cross a heterozygous dominant purple flowered plant to a recessive white flowered plant. What is…

A: From the monohybrid cross, Mendel’s law of segregation was given. According to this law, when two…

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: . In the tiny model plant Arabidopsis, the recessive allele hyg confers seed resistance to the drug…

A: Model plant = Arabidopsis The recessive allele conferring seed resistance to the hygromycin = hyg…

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: In the guinea pig, one locus involved in the control of coat color may be occupied by any of 4…

A: The gene is the basic structural and functional unit of heredity and it makes up the…

Q: Produce a Punnett square to illustrate the dihybrid cross described below: There are two common…

A: A trait is a characteristic feature that is unique to specific individual. It is represented by…

Q: A recessive epistasis cross gives in the F2 a 9:3:4 phenotypic ratio. What is the expected…

A: Epistasis: one gene interferes with the expression of the other gene.

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 butterflies, blue wings (B) are dominant over yellow wings (b), and stripes (S) are dominant over…

A: The chi-square (X2) analysis helps us to compare the observed data with the expected data. It helps…

Q: Use the following information to answer the next question. Gregor Mendel examined the inheritance of…

A: Given: Seed coat texture is represented as S - smooth and s - wrinkled. The seed coat color is…

Q: In humans, blood type is inherited based on multiple alleles in which type A and type B are dominant…

A: Note: First question is incomplete and upload it separately. In pea plants, round seeds are dominant…

Q: Tallness (T) in a certain plant is dominant to short (t), while red (R) flower color is dominant to…

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

Q: In cucumbers, speckled fruit color (u') is dominant to uniform fruit color (u), and large spines…

A: Given  Speckled fruit colour U+ is dominant to uniform fruit colour u  Large spines SS+ is dominant…

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.