The genes for mahogany eyes and ebony body are approximately 18 map units apart on chromosome III in Drosophila. Assume that a mahogany-eyed female was mated to an ebony-bodied male, and the resulting F1 phenotypically wild-type females were mated to mahogany-ebony males. Of 942 offspring, what would be the expected phenotypes and in what numbers would they be expected?

Q: In Drosophila, a heterozygous female for the X-linkedrecessive traits a, b, and c was crossed to a…

A: Genetics is a branch of biology that deals with genes, heredity, and variation. Heredity purely…

Q: How many gametes of differing genotypes can a female drosophila of genotype ABC/abc produce? How…

A: There will be same gametes will be developed in males and females. The explanation is given bellow.

Q: f the G locus were 50 or more map units from the centromere, what types and proportions  of gametes…

A: Recombination in terms of genetics describe the process that explain the exchange of genetic…

Q: Consider two hypothetical recessive autosomal genes a and b, where a heterozygote is testcrossed to…

A: A test cross is a cross in which the F1 of an unknown genotype is crossed with a homozygous…

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: In Drosophila, the gene for wing type is known to be autosomal with vestigial wings (vg) known to…

A: Vestigial wings are those which does not help in flying. They possess defected vestigial gene on the…

Q: The alleles his-5 and lys-1, found in yeast, result in cells that require histidine and lysine for…

A: a) In tetrad analysis, three types of tetrads are obtained:    Tetratypes= T = 363    Non-parental…

Q: In Drosophila, singed bristles (sn) and cut wings (ct) are both caused by recessive, X-linked…

A: Introduction :- There are two sets of chromosomes in humans. Allele pairings are categorised using…

Q: In Drosophila, the allele for red eyes (p*) is wild-type and the allele for purple eyes (p") is…

A: Mendel's principle of independent assortment states that a dihybrid cross with unlinked markers…

Q: Z00 wnine, transparent 49 pink, transparent pink, white, transparent 46 206 pink, white 205 pink 48

A: 1). pk and wh   Phenotype Genotype Number white + wh + 47 wild +++ 200 Pink, opaque pk+op…

Q: Two recessive traits in mice—droopy ears and flaky tail—arecaused by genes that are located 6 mu…

A: Testcross for the above given information is:

Q: In Drosophila fruit flies, the genes for warped wings (dwp), rumpled bristles (rmp), and pallid…

A: Three point test cross data is given in the question. The three genes are involved in this cross.

Q: In Drosophila melanogaster, ebony body (e) and rough eyes (ro) are encoded by autosomal recessive…

A: Drosophila melanogaster is a common fruit fly. It is most common subject used in majority of genetic…

Q: Drosophila females heterozygous for three recessive mutations, a, b, and c , were crossed to males…

A: Drosophila females heterozygous for three recessive mutations, a, b, and c, were crossed to males…

Q: A recessive maternal effect mutant in zebrafish, called ichabod, results in embryos lacking heads…

A: Maternal effect in zebrafish is a situation where the phenotype of an organism is determined not…

Q: The recessive allele s causes Drosophila to have small wings, and the s+ allele causes normal wings.…

A: It can be represented as,

Q: In Drosophila, a cross was made between females and wild-type males. The female parents expressed…

A: In Drosophila , there are three types of trait :-  A ) Trait for wing  B ) Trait for body colour  C…

Q: locus. The allele for brown eye color is dominant to the allele for brick red eye color and to the…

A:

Q: Another recessive mutation in Drosophila, ebony (e), is on anautosome (chromosome 3) and causes…

A: The scalloped wing phenotype is produced due to a recessive mutation in the X chromosome. The…

Q: Two recessive traits in mice—droopy ears and flaky tail—arecaused by genes that are located 6 mu…

A: According to the question, recessive traits in the mice are - Droopy ears (de) and Flaky tail (ft).…

Q: In Drosophila, males from a true-breeding stock withraspberry-colored eyes were mated to females…

A: Recombination frequency (RF) is the rate of occurrence of recombination between a pair of linked…

Q: A hypothetical brown frog with black spots (genotype BbSs) is test crossed with a green, unspotted…

A: A test cross is done to identify the genotype of an organism. In this cross, the organism is crossed…

Q: In a cross in Drosophila involving the X-linked recessive eye mutationwhite and the autosomally…

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

Q: In the fruit fly, Drosophila melanogaster, a spineless (sp, no wing bristles) female fly is mated to…

A: Genotypes: The genotypes of the given phenotypes are: • wing bristles = s+ , s (no bristles) • eye…

Q: The phenotype of crooked wings (cw) in Drosophila melanogaster is caused by a recessive mutant gene…

A: The expected phenotypes as per the dihybrid phenotype ratio and their proportionate numbers out of a…

Q: In garden pea plants, tall stem height (T) is dominant over short stem height (t), and round seed…

A: Garden pea possess two traits :- Height and shape  Height can be tall or short .Tall ( T ) is…

Q: Antennaless (al), brown eyes (bw), and ebony body (e) are recessive autosomal mutants of Drosophila…

A: Due to the ratio's incompatibility with the triple point test cross ratio (i.e. P:P:S1:S1:S2:S2:D:D)…

Q: Two pure-breeding strains of flies are mated, and the F1 are intercrossed.  The first strain has…

A: The cross asked in the question is a dihybrid cross because two characters are involved here. First…

Q: In corn, the genes that determine seed color and coat are both located on chromosome 9.  Seed color…

A: This analysis of a corn dihybrid cross revealed that seed color and coat texture are controlled by…

Q: Three recessive mutations in that affect eye colour, wing shape and body colourarew, m and b. The…

A: In Drosophila , w , m , b are three mutations that impact on eye colour , shape of wing and body…

Q: Two autosomal genes controlling beak shape in finches are 18 cM apart on the same chromosome. Pointy…

A: In this instance, we are researching how two autosomal genes influence the beak morphology of…

Q: A female Drosophila with the mutant phenotype 'notched wings' was mated to a wild type male.…

A: Drosophila melanogaster is a fly species that belong to order Diptera. This is also known as fruit…

Q: The alleles his-5 and lys-1, found in yeast, result in cells that require histidine and lysine for…

A: Genes are found on different chromosomes, occasionally far apart, but on the same chromosome, they…

Q: In Drosophila melanogaster, cinnabar eye (cn) and vestigial wing (vg) are simple recessive traits. A…

A: Cinnabar eyes = cncnv+v+ Vestigial wings = cn+cn+vv Test cross parent = cncnvv (cinnabar and…

Q: In Drosophila, the genes ct(cut wing margin), y (yellow body), and v (vermilion eye color) are…

A: Crossing over of chromosome during meiosis is normal process occurring so that there can be…

Q: Two genes of a flower, one controlling blue (B) versus white(b) petals and the other controlling…

A: When two genes linked on the same chromosome it is known as linkage. Here, F1 progeny is produced…

Q: In Drosophila, an X-linked recessive mutation, Xm causes miniature wings. List the F2 phenotypic…

A: Inheritance patterns are broadly of two types :- autosomal and sex-linked. They are further of two…

Q: Female Drosophila with cinnabar eye (cn) and vestigal wings (vg) were mated to males with roof wings…

A: The genes present on the same chromosome cannot assort rather they tend to be inherited together.…

Q: In a diploid organism of 2n=10, assume that you can label all the centromeres derived from its…

A: Meiosis creates gametes such as egg and sperm cells. During meiosis, the genetic information is…

Q: A PORTION OF THE LINKAGE MAP OF CHROMOSOME 2 IN THE TOMATO IS ILLUSTRATED HERE. o (oblate) ci…

A: Linkage map or genetic map is the representation of the linkage of genes in a chromosome. It used to…

Q: In a cross in Drosophila, a female heterozygous for the autosomallylinked genes a, b, c, d, and e…

A: Homozygous refers to the genotype of an organism with two identical alleles at a locus. Heterozygous…

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.