Let’s suppose that a gene affecting pigmentation is found on the Xchromosome (in mammals or insects) or the Z chromosome (in birds)but not on the Y or W chromosome. It is found on an autosome inbees. This gene exists in two alleles: D (dark) is dominant to d (light).What would be the phenotypic results of crosses between true-breedingdark females and true-breeding light males, and the reciprocal crossesinvolving true-breeding light females and true-breeding dark males,in the following species? Refer back to Figures 4.1 and 4.2 for themechanism of sex determination in these species.A. BirdsB. Fruit fliesC. BeesD. Humans

Q: Let’s suppose that two different X-linked genes exist in mice,designated with the letters N and L.…

A: The distance between the two genes N and L  can be surveyed by making crosses and by examining the…

Q: In humans, as well as in many other animals and some plants, the sex of the individual is determined…

A: Haemophilia is an inherited bleeding disorder where blood doesn't clot properly. It is caused when…

Q: What is chromosomal theory of inheritance? List the ways in which genes and chromosomes behave…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Assuming no crossover takes place, how many copies of the short-hair allele (h) will be present in…

A: Dominant allele Dominant allele is the factor (term use by Mendel, now it is known as gene) which…

Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: Suppose that the short allele is a meiotic drive gene, and 80% of the gametes from a heterozygous…

A: Introduction  Inheritance is the ability of organisms to pass on qualities to their offspring…

Q: In guinea pigs, the allele for black fur (B) is dominant over the allele for brown (b) fur. A black…

A: The black fur allele B is dominant and brown fur allele b is recessive in guinea pigs. When a black…

Q: A kidney-bean shaped eye is produced by a recessive gene, k, on the third chromosome of Drosophila.…

A: "Genetic variation" is the result of the recombination of genetic material during the inheritance…

Q: In humans, the genetic disease cystic fibrosis is caused by a recessive allele (a). The normal…

A: Cystic fibrosis is only caused when both of the mutant alleles for cystic fibrosis are present. AA…

Q: Let’s suppose a genetic disease is caused by a mutantallele. If two affected parents produce an…

A: Genetic disease is defined as an inherited medical condition or state caused by an abnormality in…

Q: a Punnett square for a cross between a homozygous red-eyed female (XR XR ) and a white-eyed male (Xr…

A: In Drosophila, white eye colour is recessive X-linked trait while red eye colour is dominant.…

Q: A cat is born with two X chromosomes and one Y chromosome. One of the X chromosomes carries the…

A: The fur color of the cats are generally controlled by genes present on the X-chromosome. One form of…

Q: Cinnabar eye color is a sex-linked, recessive characteristic in fruit flies. If a female having…

A: Cinnabar eye is an X-linked recessive characteristic in fruit flies.   In general, X-linked…

Q: Butterflies have an X-Y sex-determination system that is different from that of flies or humans.…

A: -The butterfly shown has a completely unique pattern of colors because o a special trait- it has two…

Q: Let’s suppose that a gene affecting pigmentation is found on the Xchromosome (in mammals or insects)…

A: Genes are the basic structural and functional unit of heredity. They carry coded genetic information…

Q: A coat color of a horse is governed by many different gene pairs. Dominant B will give the horse a…

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

Q: Cock-feathering in chickens is a sex-limited trait, limited to the male sex. If two heterozygous…

A: Sex limited traits are those traits that are determined by the autosomal genes but are limited or…

Q: In a cross between two varieties of corn, gl1gl1Ws3Ws3 (egg parent) * Gl1Gl1ws3ws3 (pollen parent),…

A: Fertilization is the process of fusion of male and female gametes that results in the formation of a…

Q: In grasshoppers, rosy body color is caused by a recessive mutation; the wild-type body color is…

A: The phenotype of an organism is depends on the expression of the gene. Usually a gene has two…

Q: In humans, color vision depends on genes encoding three pigments. The R (red pigment) and G (green…

A: The inheritance of color vision in humans depends upon three main genes that code for three…

Q: What would be the genotypic and phenotypic outcome if each parent was self-fertilized?

A: Genotype is refer to a gene or set of genes that leads to a single trait. Phenotype is refers to the…

Q: In fruit flies, eye color is carried on the X chromosome. The allele for red eyes is dominant over…

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

Q: You cross a fly with straight wings with a fly with curved wings to produce the F1 generation, all…

A: In genetics, dominance refers to the phenomenon of one gene variant (allele) on one copy of a…

Q: Two genes are on separate chromosomes (i.e., unlinked). One homologous pair of chromosomes carries…

A: case I

Q: Thorn apples produce either purple (P) or white (p) flowers, and their fruits are either spiny (S)…

A: A gene is a unit of hereditary present in thousands on the strands of DNA(deoxyribonucleic acid).…

Q: In snails, the maternal gene influences the phenotype of the direction of snail coiling. If D is an…

A: dd female cross with dd male..

Q: In humans, the mic2 gene (involved in antibody production) is found on sex chromosomes and has…

A: The pseudoautosomal inheritance is observed for the allele in the identical regions of X and Y…

Q: Three enzymes are part of a sequential pathway that produces a pigment that makes flowers red.  Each…

A: Question -Three enzymes are part of a sequential pathway that produces a pigment that makes flowers…

Q: Suppose genetic analysis reveals a serious mutation in a gene in the green region of the left-hand…

A: Chromosomes are filamentous bodies present in the nucleus. They have the ability of self-replication…

Q: In some plants a red flower pigment, cyanidin, is synthesized from a colorless precursor. The…

A: Epistasis is a genetic phenomenon in which mutation in one gene affects the mutation in other gene.…

Q: When pure breeding red dragons with large wings are mated with pure breeding green dragons with…

A: Let ‘R’ represent the red color allele and ‘r’ represent the green color allele.  Also, Let ‘L’…

Q: You have a Drosophila line that is homozygous for autosomal recessive alleles a, b, and c, linked in…

A: Recombination frequency measures the genetic linkage between a set of alleles/genes and is used to…

Q: Using the link provided. Mate two flies. a male is a wild type and a female has yellow body and…

A: There are few important points about drosophila : We know that fruit flies  have XX for females and…

Q: In C. elegans, lon-2 and unc-2 are recessive mutations that are 8 map units apart on the X…

A: A map unit is defined as the distance between two linked gene pairs where 1% of the products of…

Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…

A: The initial step is to decide the request for the three genes.This should be possible by assessing…

Q: In the fruit fly, Drosophila, eye color is a sex-linked recessive trait located on the X chromosome.…

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

Q: Let’s say there is an organism with two pairs of alleles, W/w and Z/z, each pair is located on a…

A: Cell division is a phenomenon takes place inside the cell during which parent cell undergo…

Q: If a man and a woman, both with normal vision, marry and have a colorblind son, draw the Punnet…

A: Colorblindness and hemophilia are X-linked recessive disorders. They are transmitted from female…

Q: Parents pass chromosomes in gametes to form the zygote, which will grow and develop to become an…

A: Sperm of father will have 23 chromosomes (haploid) that fuse with ovum of mother containing 23…

Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…

A: Inheritance or heredity is passing-on one trait from the parents to the progeny by either asexual or…

Q: Mate two flies. a male is a wild type and a female has yellow body and purple eyes.

A: As you asked many questions here I'm giving answer's of 3 questions  Rest please repost…

Q: A diploid plant has red flowers, heavy seeds and large leaves. The plant is a heterozygous for the…

A: The presence of two different alleles at a particular gene locus is called heterozygous.

Q: Cinnabar eyes is a sex-linked, recessive characteristic in fruit flies. If a female having cinnabar…

A: In fruit flies, cinnabar eyes is a sex-linked recessive characteristic that occurs due to mutation…

Q: In humans, as well as in many other animals and some plants, the sex of the individual is determined…

A: Haemophilia is X-linked recessive disorder. It is generally caused by a mutation in the genes which…

Q: In the Dorset sheep breed, both males and females have horns, and the trait is controlled by an…

A: According to our guideline we can answer only the first question. The alleles are the alternative…

Q: What are the F1 phenotypes expected from a cross between a heterozygous red-eyed female fruit fly…

A: The genotype of female parent fruit fly is given XWXw   The genotype of male parent fruit fly is…

Q: en colorblindness in humans is recessive and x-linked. if a woman,  heterozygous for colorblindness…

A: An Individuals receive two variant of each gene from each parent are known as alleles. These allele…

Q: A kidney-bean shaped eye is produced by a recessive gene, k, on the third chromosome of Drosophila.…

A: If the genes are located on the same chromosome then they are considered as linked genes and they…

Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…

A: To calculate The map distance separating two genes

Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.