| Date | May 2013 | Marks available | 1 | Reference code | 13M.1.HL.TZ2.35 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 35 | Adapted from | N/A |
Question
A test cross of linked genes was performed with fruit flies (Drosophila melanogaster).
What is the most likely explanation for these results not fitting the expected ratio?
A. Crossing-over
B. Non-disjunction
C. Gene mutation
D. Random variation
Markscheme
A
Examiners report
N/A
Syllabus sections
Show 43 related questions
- 17N.1.HL.TZ0.36: In a plant, dark leaves are dominant to pale leaves and yellow seeds are dominant to white...
- 17M.1.HL.TZ2.19: The genetic determination of dogs’ coats can be quite complex, with many different genes...
- 17M.1.SL.TZ1.1: Which structure found in eukaryotes has a single membrane? A. Nucleus B. Lysosome C....
- 16N.1.HL.TZ0.35: Some of the ratios that Morgan investigated in genetic crosses did not correspond with...
- 16N.1.SL.TZ0.16: The diagram shows a pedigree chart. What does it reveal about the inheritance of the blood...
- 16M.1.HL.TZ0.22: This is the cross that led to the discovery of non-Mendelian ratios in Morgan’s experiments...
- 16M.1.HL.TZ0.21: The statement is about the genetic control of cat coat colour. In a cross between two...
- 15M.1.HL.TZ1.34: Skin colour is a trait controlled by polygenic inheritance. Which statement is correct?A....
- 15M.1.HL.TZ2.25: Which is a statement of Mendel’s law of independent assortment? A. Allele pairs separate...
- 15M.1.HL.TZ2.23: The curly hair of the coat of Selkirk Rex cats is due to the presence of the allele SC. ...
- 15M.2.HL.TZ1.2a (i): A study of 600 adolescents in Sweden showed that milk consumption has a positive effect on...
- 15N.1.HL.TZ0.35: In a fruit fly experiment, grey body, normal winged (homozygous dominant) fruit flies were...
- 15N.2.HL.TZ0.4c: Deduce one possible recombinant offspring of individual after a test cross.
- 15N.2.HL.TZ0.4b: Compare the information that could be deduced when the genotypes are presented as AaBb or
- 15N.2.HL.TZ0.4a: Determine the phenotype of Aabb.
- 13M.2.HL.TZ2.2a (ii): In a strain of soybeans, high oil content (H) in seeds is dominant to low oil content (h) ...
- 13M.2.HL.TZ2.2b (ii): Determine, with a reason, whether this karyotype shows that non-disjunction has occurred.
- 13M.2.HL.TZ2.2a (iii): In a strain of soybeans, high oil content (H) in seeds is dominant to low oil content (h) ...
- 13M.1.HL.TZ1.33: In fruit flies (Drosophila melanogaster) grey body is dominant to black body and long wings...
- 13M.1.HL.TZ1.34: Human skin colour shows continuous variation. What does this indicate about the pattern of...
- 13M.1.HL.TZ2.36: Why do humans inherit continuous variation with regard to height? A. The trait for tallness...
- 13N.1.HL.TZ0.35: In a variety of tulips, V is the allele for variegated colour and C is the allele for...
- 13N.2.HL.TZ0.2c: Using an example, describe polygenic inheritance.
- 11M.2.HL.TZ2.7b: Describe how human skin colour is determined genetically.
- 12M.1.HL.TZ2.34: What causes genetic variety in the formation of gametes during meiosis? A. Crossing over in...
- 12M.1.HL.TZ1.34: What causes variation in both sexually and asexually reproducing organisms? A. Mutations B....
- 09M.2.HL.TZ1.2a (i): State the genotype of the heterozygous parent using the correct notation.
- 09M.2.HL.TZ1.2a (ii): Identify which individuals are recombinants in this cross.
- 09M.2.HL.TZ1.2a (iii): Explain what has occurred to cause these results.
- 09M.2.HL.TZ2.3b: Explain, using a named example, how polygenic inheritance gives rise to continuous variation.
- 09M.1.HL.TZ1.35: Which of the following processes result in the production of recombinants? I. Crossing over...
- 09M.1.HL.TZ2.31: Male flies, heterozygous for both grey body and normal wings, were mated with black-bodied,...
- 09M.1.HL.TZ2.30: If a heterozygous grey fruit fly is mated with a black-bodied fruit fly, what proportion of...
- 10M.1.HL.TZ2.35: Which are the possible recombinants in a dihybrid test cross involving the linked genes...
- 10M.1.HL.TZ1.12: What is a suspected heterozygous individual crossed with in a test cross? A. Homozygous...
- 10M.1.HL.TZ1.34: A test cross resulted in these recombinants: Which of the following was the parental test...
- 09N.1.HL.TZ0.35: What is polygenic inheritance?A. A character that is controlled by two or more genesB. A...
- 12N.1.HL.TZ0.34: In humans, wavy hair is dominant to straight hair and free ear lobes are dominant to fixed...
- 10N.2.HL.TZ0.1a(ii): The activity of α-amylase was tested at successive concentrations of gibberellin. Determine...
- 10N.2.HL.TZ0.1b: Discuss the consequence of crossing gid1-1 heterozygous rice plants amongst themselves for...
- 10N.2.HL.TZ0.1a(i): State which variety of rice fails to respond to gibberellin treatment.
- 09N.2.HL.TZ0.3a: The genes described above form a linkage group. Define linkage group.
- 09N.2.HL.TZ0.3b: A cross is made between squirrels of the following genotypes. Using a similar format,...
