Bicoid is a maternal-effect gene in the fruit fly Drosophila. Recessive mutations in bicoid can result in fly larvae that have no head, and thus are embryonic lethal. Which of the following crosses will result in offspring with the embryonic lethal, no head phenotype? (+ indicates a wild-type allele) a) bcd /bcd (male) x bcd+/ bcd (female) O b) bcd/ bcd (male) x bcd+/ bcd+ (female) O c) bcd+/ bcd+ (male) x bcd/ bcd (female) O d) bcd+/ bcd (male) x bcd+/bcd (female)

Bicoid is a maternal-effect gene in the fruit fly Drosophila. Recessive mutations in bicoid can result in fly larvae that have no head, and thus are embryonic lethal. Which of the following crosses will result in offspring with the embryonic lethal, no head phenotype? (+ indicates a wild-type allele) a) bcd /bcd (male) x bcd+/ bcd (female) O b) bcd/ bcd (male) x bcd+/ bcd+ (female) O c) bcd+/ bcd+ (male) x bcd/ bcd (female) O d) bcd+/ bcd (male) x bcd+/bcd (female)

Name: Bicoid is a maternal-effect gene in the fruit fly Drosophila. Recessi
Uploaded: 2024-03-20T06:42:55.000Z
Channel: Bartleby
Description: Bicoid is a maternal-effect gene in the fruit fly Drosophila. Recessive mutations inbicoid can result in fly larvae that have no head, and thus are embryonic lethal.Which of the following crosses will result in offspring with the embryonic lethal, n

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter6: Cytogenetics: Karyotypes And Chromosome Aberrations

Section: Chapter Questions

Problem 2QP: Given the karyotype shown at right, is this a male or a female? Normal or abnormal? What would the...

See similar textbooks

Similar questions

Human sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele? c. If a female is heterozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele?
The following pedigree shows the pattern of inheritance of red-green color blindness in a family. Females are shown as circles and males as squares; the squares or circles of individuals affected by the trait are filled in black. What is the chance that a son of the third-generation female indicated by the arrow will be color blind if the father is not color blind? If he is color blind?
Individuals of genotype AaBb were mated to individuals of genotype aabb. One thousand offspring were counted, with the following results: 474 Aabb, 480 aaBb, 20 AaBb, and 26 aabb. What type of cross is it? Are these loci linked? What are the two parental classes and the two recombinant classes of offspring? What is the percentage of recombination between these two loci? How many map units apart are they?
Familial retinoblastoma, a rare autosomal dominant defect, arose in a large family that had no prior history of the disease. Consider the following pedigree (the darkly colored symbols represent affected individuals): a. Circle the individual(s) in which the mutation most likely occurred. b. Is the person who is the source of the mutation affected by retinoblastoma? Justify your answer. c. Assuming that the mutant allele is fully penetrant, what is the chance that an affected individual will have an affected child?
Theodor Boveri predicted that malignancies would often be associated with chromosomal mutation. What lines of evidence substantiate this prediction?
A geneticist discovers that a girl with Down syndrome has a Robertsonian translocation involving chromosomes 14 and 21. If she has an older brother who is phenotypically normal, what are the chances that he is a translocation carrier?
The gene controlling ABO blood type and the gene underlying nail-patella syndrome are said to show linkage. What does that mean in terms of their relative locations in the genome? What does it mean in terms of how the two traits are inherited with respect to each other?
What is physically exchanged during crossing over?
A proband female with an unidentified disease seeks the advice of a genetic counselor before starting a family. Based on the following data, the counselor constructs a pedigree encompassing three generations: (1) The maternal grandfather of the proband has the disease. (2) The mother of the proband is unaffected and is the youngest of five children, the three oldest being male. (3) The proband has an affected older sister, but the youngest siblings are unaffected twins (boy and girl). (4) All the individuals who have the disease have been revealed. Duplicate the counselors feat
Human females have two X chromosomes XX; males have one X and one Y chromosome XY. a. With respect to X-linked alleles, how many different types of gametes can a male produce? b. A female homozygous for an X-linked allele can produce how many types of gametes with respect to that allele? c. A female heterozygous for an X-linked allele can produce how many types of gametes with respect to that allele?
a. If an individual who is homozygous for the mutation found in individual 2 and heterozygous for the mutation found in individual 4 marries an individual who is homozygous for the mutation found in individual 4 and heterozygous for the mutation found in individual 2, what will be the phenotype of their children? b. List the intermediate that would build up in each of the types of children who could not produce protein E.
Assume that a meiotic-nondisjunction event causes trisomy 8 in a newborn. If two of the three copies of chromosome 8 are absolutely identical, at what point during meiosis did the nondisjunction event take place?