Imagine that you set up a three-point mapping cross to determine the order of three X-linked genes. You have recessive mutations available for all three genes: yellow, white, and echinus. A heterozygous F1 Drosophila female is crossed to hemizygous mutant male. The observed numbers and phenotypes of F2 are as follows. 4685 yellow, white, echinus 4759 wild type 80 yellow 70 white, echinus 193 yellow, white 207 Echinus 3yellow, echinus 3white Based on this data which of the above phenotypic classes represent the PARENTAL types?

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

A: Need to find the recombination frequency between the two genes.

Q: Red-green colorblindness is determined in humans by a single X-linked locus. Colorblind males are…

A: XBY male has normal vision.XbY male has Red-green color blindness.XBXB females are normal…

Q: If a male bird that is heterozygous for a recessive Z-linked mutation is crossed to a wild type…

A: The condition where two identical genes are present in an individual for a particular character, is…

Q: In Primula vulgaris (primrose), purple flowers are dominant to white flowers, and short plants are…

A: Primula vulgaris (primrose) have two types of Traits :- A ) Traits for flower color :- In this ,…

Q: Cross C: Homozygote wild type flies (+/+) were crossed with white eye flies. for the F1 and F2…

A:

Q: Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants…

A: Answer: DIHYBRID CROSS : It is the cross made between two traits of an individual.  Phenotypic…

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: Coat color in cats is determined by genes at several different loci. At one locus on the X…

A: An organism has phenotype and genotype. Phenotype is the observable characteristics and genotype is…

Q: For an X-linked recessive allele, what proportion of female offspring will be carriers in the cross…

A: X - linked recessive allele -  This type of allele is caused due to genetic mutation in the gene. In…

Q: Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants…

A: Dihybrid cross: A dihybrid cross occurs between two organisms that are identical hybrids for a given…

Q: In flies, small wings are recessive to normal wings. If a cross between two flies produces 8…

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

Q: Imagine that you set up a three-point mapping cross to determine the order of three X-linked genes.…

A: This is the case of three point test cross. The crossing occurs between the heterozygous parent for…

Q: In silkmoths (Bombyx mori), red eyes (re) and white-banded wings (wb) are encoded by two mutant…

A: Sometimes genes depicting two characters are present on the same chromosome. Such genes are called…

Q: Write the genotype(s) of the flies in each generation. Use a low dash (e.g. A_ B_) to indicate…

A: Given  Both have fruitflies are taken from different strains.  Strain A = bright red eye  Strain B =…

Q: A geneticist is using a three-point testcross to map three linked Drosophila recessive mutations…

A: Testcross progeny phenotype Number Crossover Curved 281 Parental Anomalous, Buckled 279…

Q: The wingless fruit fly phenotype (unable to grow wings) is recessive to normal wing growth. A…

A: The wingless male fruit fly is crossed with a wingless female fruit fly and the progeny produced by…

Q: In garden peas, yellow (Y) seed color is dominant to green (y). Because yellow and green are two…

A: According to the Mendelian Laws dominance, independent assortment, and segregation, various…

Q: A cross between two pure breeding pea plants in which one parent produced yellow seeds and the other…

A: Punnet square is the diagrammatical square that helps to determine all resultant combinations of…

Q: You are studying the inheritance pattern of hair color in troll dolls, which have XY sex…

A: Given: In troll doll, XY determination is present. Crossed a true-breeding blue-haired male with a…

Q: How many Barr bodies in a person with genotype XXXXX? How is the structure of a Barr body different…

A: The mammalian males contain XY chromosome and females contain XX chromosome. So, the number of…

Q: A standard three-point mapping is conducted for recessive mutations in autosomal genes purple eye…

A: Chromosome mapping first introduce the great scientist T.H. Morgan. By the help of recombinant…

Q: Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants…

A: According to the concept of genetic linkage, when genes are far apart or on the different…

Q: In Drosophila, the allele for brown eyes (b) is recessive, while the red eye allele (B) is dominant.…

A: Dominant traits Red eye - B Normal body - E Recessive traits brown eye - b ebony body - e The…

Q: In snapdragons, heterozygotes for one of the genes have pink flowers, whereas homozygotes have red…

A: Incomplete dominance is an intermediate form of inheritance. In snapdragon, it was observed that…

Q: In fruit flies, red eyes (R) are dominant over purple (r). Two red- eyed parents are crossed,…

A: An allele is a variant form of a given gene.  Phenotype is the observed physical traits of an…

Q: In fruit flies, eye shape is an X-linked trait. Round eyes (XG) are dominant to almond-shaped eyes…

A:

Q: Red eyes are dominant on fruit flies but an x-linked recessive allele will produce white eyed flies.…

A: Eye colour of Drosophila is X linked traits . This means genes for Eye colour trait is available on…

Q: In flies, assume black (B) is dominant and green (b) is recessive for abdomen color, and straight…

A: A genetic map displays the map distance (in cM) between any two loci as well as the position of…

Q: If a male bird that is heterozygous for a recessive Z-linked mutation is crossed to a wild type…

A: In case of birds the males are homozygous for the sex chromosome and the genotype is ZZ. The females…

Q: In Drosophila, gray body color is dominant to ebony body color, while long wings are dominant to…

A: Drosophila study experiments Gray body colour - dominant -E Ebony body colour- recessive- e long…

Q: A wild-type male and a wild-type female Drosophila with red eyes and full wings are crossed. Their…

A: Genetics, the study of heredity generally and of genes particularly. genetics forms one in every one…

Q: Anhidrotic ectodermal dysplasia is an X-linked recessive disorder in humans characterized by small…

A: Anhidrotic ectodermal dysplasia (AED) is a type of immune deficiency observed in the human body. The…

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 cats, black fur color is caused by an X-linked allele; the other allele at this locus causes…

A: The question is related to X chromosome inactivation in mammalian females. One of the X chromosomes…

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

A: The allele for miniature wings is represented with w And the allele for long wings with + The allele…

Q: The pedigree below shows the inheritance of red-green colorblindness, an X-linked recessive trait…

A: X chromosome of son is always comes from the mother. Only Y chromosome comes from the father . Any…

Q: Assuming two independently assorting gene loci for eye color and wing length in Drosophila…

A: A dihybrid cross is a type of cross in which two traits are involved .  As per the question , two…

Q: In one of his experiments, Mendel crossed homozygous yellow plants with homozygous green plants. The…

A:

Q: Anhidrotic ectodermal dysplasia is an X-linked recessive disorder in humans characterized by small…

A: The medical condition Anhidrotic ectodermal dysplasia is caused due to mutation precisely in the…

Q: In domesticated cats, the following are Independently assorting: Normal ears (T) is dominant to…

A: Genetics is the field of biology that deals with the flow of genes (the hereditary factor) in life…

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: Feather colour in birds is controlled by two genes on separate chromosomes. Blue colour (B) is…

A: Blue colour (BB) = dominant over the absence of colour (bb). Red colour (RR) = dominant over the…

Q: In fruit flies, the phenotype for eye color is determined by a certain locus. E indicates the…

A: In the Drosophilidae family, Drosophila melanogaster is a fly species that are Diptera in the order.…

Q: In cats, coat color is an X-linked trait with incomplete dominance.  Yellow coat is caused by the…

A:

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: The flowers of 4 o‟ clock plants may be red, pink or white. Reds crossed to whites produced only…

A: The observed flowers are given by:   Color Frequency Red 113 White 129 Pink 242   N = 484…

Q: A reciprocal cross is useful when determining which of the following? If a trait is sex-limited…

A: Reciprocal cross It is a concept of crossing F1 hybrids with one of the parents. When F1 is cross…

Q: A cross in Drosophila melanogaster involved the recessive X-linked genes for white eye (w), yellow…

A: The largest number are of parental type in three point test cross. The lowest number depicts double…

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…

Angiosperm Reproduction

The process of sexual reproduction in flowering plants is known as angiosperm reproduction. In flowering plants, reproduction begins with pollination, or the transfer of male gametes (pollen) from the male reproductive organ (anther) to the female reproductive organ (pistil), and ends with fertilization of the female gametes (egg), which produces a zygote, which then grows to become a mature plant.