Bicoid is a maternal-effect gene in the fruit fly Drosophila that controls anterior/posterior axis formation. Recessive mutations in bicoid can result in fly larvae that have no head, and thus are embryonic lethal. bcd+ is the wild type bicoid allele bcd is the recessive mutant bicoid allele

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: X-linked, recessive disorder in which muscles waste away early in life, resulting in death in the…

A: X linked inheritance is a type of sex linked inheritance in which mutation occurs in one of the X…

Q: A defective gene on chromosome 15 causes Tay-Sachs disease. It is a central nervous system…

A: Given: A pedigree. A defective gene on chromosome 15 causes Tay-Sachs disease. Individual III - 1 -…

Q: (A) Which of the above offspring are recombinant? (B) What is the map distance between the genes?

A: ANSWER1. Recombinants: These are those offspring that have traits different from their parents.…

Q: nheritance of one mutant allele of BRCA1 is associated with 70-80% lifetime risk of developing…

A: BRCA1 is a tumor suppressor gene inactivation leads to breast cancer.

Q: You discover a new X-linked mutation for antenna shape in Drosophila (fruit flies) which produces…

A: Correct option is (b) 0       Step 1:  The Drosophila has been  X linked mutation which can…

Q: A male mouse with genotype Igf2 Igf2m is crossed with a female who is Igf2 Igf2.  What would be the…

A: 3/4 of the offspring would be normal; 1/4 would be dwarf

Q: What are the expected phenotypic ratios in the F, generation? If one of the F, males is mated to an…

A: The cross is between red bar-eyed female and purple normal eyed male. The genotype of the female is…

Q: A recessive mutation pd causes purple eyes in Drosophila, in contrast to the wildtype red eyes. A…

A: The objective of this question is to determine the proportion of offspring that will have purple…

Q: Give the phenotypic effects and chromosomal aberrations of the following syndromes/disorders: Down…

A: DOWN SYNDROME. Down syndrome is the most common chromosomal disorder due to the autosomal trisomy of…

Q: Pedigree information regarding the incidence of Tay-Sachs within a family is depicted above. The row…

A: Human beings are diploid organisms, i.e., hey have two sets of chromosomes. Humans carry 22 pairs of…

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: A defective gene on chromosome 15 causes Tay-Sachs disease. It is a central nervous system…

A: Tay-Sachs disease is an inherited disorder that results in progressive destruction of nerve cells in…

Q: Bow-legs is hypothesized to be X-linked recessive trait in Drosophila melanogaster. The P1 virgin…

A: Introduction :- When the test statistic is chi-squared distributed under the null hypothesis, a…

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: The pedigree below shows the inheritance pattern of a rare X-linked allele for one family. The…

A: Pedigree is a family chart where genetic councillor put some symbol for easy description of a…

Q: The balancer chromosome includes GFP and a mutation in gene X that causes flies to be sterile in the…

A: A homozygous mutation is one that affects both the paternal and maternal alleles. Compound…

Q: ile she does not have the condition she has a other who has the condition. Hemophilia is due a…

A: Hemophilia being an x linked recessive disease is a disease in which X chromosome is mutated. As…

Q: Parent Cross: Blue-Eyed Male x Normal Female Blue-Eyed Female F1 Offspring Normal Male Normal Female…

A: Drosophila melanogaster. The position of the white eye gene, positioned at the x-chromosome of this…

Q: The genotype of a dwarf mouse is Igf2 Igf2–. What is the genotype of its father who has normal body…

A: Knowing how features are passed down from parents to children requires incorporating knowledge of…

Q: Color-blindness is an X-linked recessive disorder. Under what circumstances will this condition…

A:

Q: In humans, Cystic Fibrosis an autosomal recessive trait, currently with medicine advances people…

A: Genetic disorders or traits known as autosomal recessive traits occur when a person inherits two…

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: Colorblindness and hemophilia are both X-linked traits in humans. Explain how a female who has a…

A: Colourblindness and haemophilia are both X-linked traits in humans. Haemophilia is a bleeding…

Q: Are the genes linked, unlinked, or incompletely linked? In Drosophila, white eyes (w) and vestigial…

A: In Drosophila, white eyes (w) and vestigial wings (vg) are recessive traits to the red eyes and wild…

Q: Vestigial wing is a recessive autosomal mutation in the fruit fly Drosophila melanogaster. Wild-type…

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

Q: An nonsense mutation in the gene for a human enzyme is most likely to be Dominant Recessive…

A: Nonsense mutations  The change is single nucleotide base which leads to the production of defective…

Q: A man suffered from rare a skin condition that included thickening of the skin and the formation of…

A: The Porcupine man had the rare condition. The rare condition includes the thickening of the skin and…

Q: There are six types of agglutinogen named C,D, E and c,d,e.the first three are dominant and last…

A: In blood typing, antigens on the surfaces of red blood cells (RBCs) are known as agglutinogens.…

Respiratory Infections

Respiratory infections are infectious diseases of the respiratory tract that are mostly caused by bacteria and viruses. They cause infections of the throat, sinuses, airway path, and lungs. Respiratory infections are typically divided into two types: upper tract respiratory infection and lower tract respiratory infection.