Butterflies show 3 phenotypes due to incomplete dominance at the D locus with alleles DY and DB giving green phenotype in heterozygotes and yellow and blue in homozygotes. a) A population of butterflies showed 49% yellow, and 51% blue and green. What percentage of the gametes for the next generation would contain the DB allele? b) In another population only 1% of the butterflies are blue, what is the DY allele frequency? c) If the butterflies were subject to predation by birds that could easily detect blue & yellow individuals what effect would you expect this to have on the genotype  and allele frequencies over time? Indicate possible percentages.

Q: When many families were tested for their ability to taste the chemical PTC, the parental pairs were…

A: The ability to taste PTC is a dominant trait. Taster = TT, Tt Non taster = tt

Q: A) Calculate genotype frequencies of RR; Rr and rr in the population.      B) Calculate the allele…

A: This data is comprised with Incomplete Dominance.  Incomplete Dominance: In this type of…

Q: The V locus in a species of wild apples affects the redness of the fruit. There are two alleles, V1…

A: When two or even more genes produce a single contribution to the resulting phenotype, or when…

Q: n guinea pigs, rough coat dominant (r) to smooth coat (r) and black coat (b) is dominant to white…

A: 1 ) Genotypes of the parent will be : RrBb                     and…

Q: If the a and b loci are 40 cM apart and an AABB and aabb individual mate: What gametes will the F1…

A: The recombinants means the individual form by combination of two different alleles other than…

Q: A heterozygous green eyed monster is crossed with a purple eyed monster. a)What proportion…

A: Organisms can be homozygous or heterozygous for a gene. An organism can be homozygous dominant if it…

Q: In mice, the gene C for colored fur is dominant over its allele c for white. The gene B for normal…

A: Introduction Genetics makes a distinction between genotype and phenotype. An organism's entire…

Q: Suppose that you have 72 F2 flies from a cross, and expected that they would show a phenotype ratio…

A: This 9:3:3:1 phenotypic ratio is the classic Mendelian ratio for a dihybrid cross in which the…

Q: In minotaurs, an allele for round horns (R) is dominant to an allele for straight horns (r). At a…

A: Dominant allele frequency (p) =.4 p + q = 1 q = 1 -.4 =.6  p 2  +q 2 +  2pq  = 1    The proportion…

Q: How is trait w unlinked if vw and zw have the same number of phenotypes (50)?

A: Unlinked genes are those that are either far apart on the same chromosome or present on different…

Q: In which type of cross(es) can we apply and demonstrate the law of segregation and law of…

A: Law of independent assortment and law of segregation were introduced by Gregor Johann Mendel.…

Q: 7) In some populations of grasses, the ability to grow in soil sprayed with a certain herbicide is a…

A: Hardy Weinberg Principle states that the gene frequency in a population remains constant from…

Q: A wild-type fruit fly (heterozygous for gray body color and red eyes) is mated with a black fruit…

A: Recombination frequency is defined as the frequency of a single chromosomal crossover between two…

Q: Chi-square computed

A: Chi-squared tests are a statistical measure that are used to determine whether the difference…

Q: Consider a situation where F1 is backcrossed with one of its parental lineage and we obtained…

A: Introduction An allele is an alternative form of a given gene, meaning it is one of two or more…

Q: Phenotypically wild-type female Drosophila, whose mothers had spineless bristles (ss) and fathers…

A: The percentages of chromosomal crossover events that take place between various alleles are…

Q: Of the eight possible phenotypic combinations in the F2 generation, which ones are the product of a…

A: Introduction: Crossing over is fundamental for the basic separation of chromosomes during meiosis.

Q: #2 a) Table 1 shows the results that Thomas Hunt Morgan got when his lab crossed Red-eyed fruit…

A: T.H. Morgan with the help of this experiment demonstrated the X-linked pattern of inheritance. When…

Q: While most commercial hens lay white eggs, certain Chinese and Chilean hens lay blue-green eggs. It…

A: It is given that blue eggshell pigment allele (B) is dominant to white. If the hen population is in…

Q: In birds, wingspan is determined by two genes, one with complete dominance of one allele over the…

A: The mean of the data is determined by  Mean = ∑total number of valuesvalue Mean = (20 + 19.6 + 18.3…

Q: In fruit flies, the allele for long wings (A) is dominant to the allele for short wings (a), and the…

A: Genes are the basic functional units of the heredity, that aids in transferring the genetic…

Q: 3. In humans, astigmatism is dominant over normal vision and right-handedness is dominant over…

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

Q: Two genes, U and H, affect wing development in a species of flying pigs, where some pigs have wings…

A: Introduction :- A gene is a unit of genetic information that is passed down from parents to…

Q: In a different population of mice in New Mexico, coat coloration is influenced by a single gene…

A: The skin color is encoded by the B gene.

Q: Phenotype Number of Offspring Wide wing, gray 536 Wide wing, brown 45 Narrow wing, gray 75 Narrow…

A: Diploid organisms have two copies of chromosomes, one from each parent. Therefore, some autosomal…

Q: Butterflies show 3 phenotypes due to incomplete dominance at the D locus with alleles DY and DB…

A: Generally, in heterozygotes, the dominant allele expresses itself by masking the expression of the…

Q: If a homozygous green leaf is represented by YY and a homozygous yellow leaf is represented by yy,…

A: An organism's phenotype represents its observable characteristics or traits. In this case, YY…

Q: Excessive secretion of male sex hormones results in premature sexual maturation in males and…

A: Hardy-Weinberg equilibrium This principle states that in a population, the genetic variation will…

Q: Two true-breeding varieties of maize, one 11 cm high and the other 47 cm high were crossed and the…

A: A gene is a unit of genetic material and alleles are the alternative form of genes present at the…

Q: Butterflies show 3 phenotypes due to incomplete dominance at the D locus with alleles DY and DB…

A: Incomplete dominance is a type of inheritance in which neither of the alleles of a gene is…

Q: Consider the following statement: ‘female, w+w flies have red eyes’. In this example: Group of…

A: The objective of the question is to identify the correct relationship between genotype and phenotype…

Q: Phenotypically wild-type female Drosophila, whose mothers had spineless bristles (ss) and fathers…

A: Given  43 ebony bodies and spineless bristles 49 wild type 336 ebony bodies, wild type bristles 328…

Q: 1) In some species of pea plant, pea colour is determined by one pair of alleles and pea shape by…

A: It is said here that in some pea plant species, pea color is controlled by one pair of alleles while…

Q: Carrion beetles lay their eggs in dead animals and then bury them in the ground until they hatch.…

A: Introduction: * Carrion beetles lay their eggs in deceased animals and bury them.  *The choice for…

Q: In griffins, coat colour is determined by a single gene with a completely dominant black (B) allele…

A: The phenotype and genotype of offsprings depend on the gene that they inherit from their parents.

Q: Why are the types of offspring described in part Fig1(a) more numerous than those described in Fig…

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

Q: In a species of fish, the allele for long fins (F) is dominant over the allele for short fins (f).…

A: Given:- The allele for long fins (F) is dominant over the allele for short fins (f).  we cross 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.