Miniature wings in Drosophila melanogaster are due to an X-linked gene (Xm) that is recessive to an allele for long wings (X*). Sepia eyes are produced by an autosomal gene (s) that is recessive to an allele for red eyes (s1). A female fly that has miniature wings and sepia eyes is crossed with a male that has normal wings and is homozygous for red eyes. In the F1 generation, how many of the total offspring will be females with long wings and sepia eyes? O a. 1/16 O b. 1/8 O c. 1/4 d. 0

Q: In Drosophila melanogaster, white eyes (w) is an X-linked recessive mutation. Normal eyes are red…

A: The normal eyes are red in Drosophila melanogaster. Normal red eyes are represented by W. Whereas,…

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

A: Gene mapping is a process through which scientists can evaluate the presence and position of genes…

Q: In Drosophila flies, the allele b gives a black body, and the allele b+ gives brown, the wild-type…

A: In drosophila , There are three genes :- Black body b , waxy wings wx and cinnabar eyes cn .While ,…

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

A: If the genes are located on the same chromosome then the crossing over between them will be reduced…

Q: Glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as an X-linked recessive gene in…

A: Glucose 6-phosphate dehydrogenase deficiency is inherited as an X-linked recessive gene. Woman has…

Q: Brachydactyly type D is human autosomal dominant condition in which the thumbs are abnormally short…

A: Brachydactyly type D is a genetic abnormality, which occurs due to a dominant gene mutation in the…

Q: A yellow female is crossed with a gray male. The F1 are intercrossed to produce the F2. Give the…

A: As given in the question, in case of Drosophila, yellow body color is due to an X-linked gene that…

Q: An animal is heterozygous for two autosomal genetic traits found on different chromosomes. Purple…

A: The chromosome with the centromere near the end of the chromosome rather than in the middle. And…

Q: Eye color in Drosophila is determined by a gene is on the X chromosome, with the red-eye allele…

A: Each gene possesses two forms of alleles. These forms include a dominant allele and a recessive…

Q: Recessive alleles may be expressed in a child if they are inherited ... (Choose all that apply)…

A: X-linked Recessive diseases are those genetic diseases that are caused by the mutation of genes on…

Q: A female Drosophila fly is heterozygous for three recessive pigmentation mutations called pk, bk,…

A: Gene expression is a process in which the genetic instructions of genes are utilized to manage…

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: Below is a pedigree from one family (two parents and eight children). Four of the children…

A: Pedigree chart It is a diagram that represents the occurrence of phenotypes of a particular gene in…

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: A possible explanation for the increased incidence of Tay-Sachs disease among Ashkenazi Jews is

A: Tay Sachs is a rare autosomal recessive disorder that causes mental and physical disabilities…

Q: It is assumed that in Drosophila the following genotypes produce phenotypes. َA- B- = Red color A-…

A: Genetics may be a discipline of biology concerned with the study of genes, genetic diversity, and…

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: Consider three independently assorting autosomal genes in Drosophila: X, Y and Z. When crossed to a…

A: The genotype of male drosophila = XXyyZz The genotype of female drosophila = XxYYZz

Q: Black body (b) and purple eye (pr) are recessive autosomal mutations in Drosophila. Bridges are…

A: b - allele for black body - recessive pr - allele for purple eye - recessive B - wild type for body…

Q: Color blindness in humans is controlled by an X-linked completely recessive allele (Xc), while…

A: Introduction :- Color blindness (colour vision deficit) is a condition in which a person's ability…

Q: In Drosophila, the gene loci for curved wings and purple eyes are 20 centimorgans (map units) apart…

A: When two genes present on the same chromosome, they are called as the linked gene and their…

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: 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: In humans, hemophilia is an X-linked recessive disorder that affects the gene for factor VIII…

A: Genetic disorders can be inherited either through recessive or dominant mutation. In case of a gene…

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

A: Given: Miniature wings Xm - recessive Long wings X+ - dominant Male parent - long wings Female…

Q: In Drosophila melanogaster, white eyes (w) is an X-linked recessive mutation. Normal eyes are red…

A: Red eyes (XW) = dominant (normal)white eye (Xw) = recessive (affected)Normal wing shape(Vg) =…

Q: cats, a sex-linked recessive allele, d, results in dystrophin-deficient muscular dystrophy. Its…

A: In this case mother would be heterozygous for polydactyly because she transfer f  allele to male…

Q: If a Drosophila female that is homozygous for an X-linked recessive mutation is bred with a male…

A: All the male offspring who will get their X chromosome from their mother will show mutant phenotype.…

Q: In Drosophila melanogaster, white eyes (w) is an X-linked recessive mutation. Normal eyes are red…

A: Inheritance is defined as the passing of genetic inheritance from parental to next generation.

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: A homozygous gray female is crossed with a yellow male. The F1 are intercrossed to produce the F2.…

A: It is given that a homozygous gray female is crossed with the yellow male. The yellow color due to…

Q: In Drosophila, ebony body colour is produced by a recessive gene a and wild-type (gray) body colour…

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

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: Drosophila, yellow body color is due to an X-linked gene that is recessive to the gene for gray body…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: In the fruit fly, dumpy wings (d) and purple eyes (p) are encoded by mutant alleles that are…

A: The two genes are involved in this case. The wings and eye encoding genes are involved here. The…

Q: Consider the following three autosomal recessive mutations in Drosophila: vestigial wings (v); wild…

A: Three point test cross is given in the question. The F2 progenies is used to find the middle gene.

Q: In the fruit fly Drosophila, a rudimentary wing called vestigial and the dark body color called…

A: This species is used because of its small size,short generation time and ability of females to lay a…

Q: In a cross between Aa Bb XCDXCD and Aa Bb XCDY, the A gene controls earwax- where wet earwax is…

A: A= earwax  B- tasting ability C- color vision D= dystrophin enzyme

Q: In Drosophila, the X-linked recessive mutation vermilion (v) causes bright red eyes, in contrast to…

A: Genetic traits are regulated by genes.

Q: In Drosophila flies, the allele b gives a black body, and the allele b+ gives brown, the wild-type…

A: Genes are the hereditary units of life. The genes can be linked or may not be linked.  When two…

Q: In humans, the gene for albinism (a) is recessive to the gene for normal skin pigmentation (A).…

A: An allele is a variant form a gene and is present in two forms: dominant and recessive. The dominant…

Q: Drosophila melanogaster body color is controlled by one gene while wing shape is controlled by a…

A: Mendel's law of independent assortment states that the alleles of two  different genes get sorted…

Q: In human beings, the gene for red‑green colorblindness (r) is sex‑linked and recessive to its allele…

A: Given that colorblindness is a recessive X-linked trait. Hence in females, both X chromosomes should…

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

A: If the X chromosome is to autosome pair ratio in the Drosophila is 1, the fly would be female. If…

Q: In drosophila, a recessive mutation (m-) of a maternal effect gene results in an abnormal  phenotype…

A:

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

A: Mapping deals with sequence, in which genes appear on a chromosome and their distance apart. Mapping…

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

A: The X-linked inheritance is the transfer of X-chromosome from one generation to another. In females,…

Q: In the fruit fly Drosophila melanogaster, the following genes and mutations are known:Wing size:…

A: Gene: Genes are genetic material that passes from parents to progeny. The dominant allele can…

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.