Q. No.The mode of inheritance of the trait shown in the following pedigree is most likely:
1.
Autosomal recessive
2.
Sex-linked recessive
3.
Autosomal dominant
4.
Sex-linked dominant
An F2 phenotypic ratio of 1: 4: 6: 4: 1 from a cross AaBb X AaBb is expected in the case of:
| 1. | Dominant epistasis | 2. | Complementary genes |
| 3. | Polygenic inheritance | 4. | Independent assortment |
A dihybrid test cross results in a recombination frequency of 50%. Most likely the two genes under consideration:
| 1. | are closely linked on the same autosome |
| 2. | are located on heterologous chromosomes |
| 3. | are present on the X chromosome |
| 4. | are located on the same chromosome, one on either side of the centromere |
Assuming independent assortment, the percent of progeny with genotype AABb from a cross AaBb X AaBb is expected to be:
| 1. | 7.5 | 2. | 15 |
| 3. | 12.5 | 4. | 30 |
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The mode of inheritance of the trait shown in the given pedigree is MOST likely:
| 1. | X-linked recessive | 2. | Autosomal recessive |
| 3. | X-linked dominant | 4. | Autosomal dominant |
The number of linkage groups in a plant with a normal diploid number of chromosomes in a somatic cell as 16 will be:
1. 16
2. 8
3. 4
4. It is impossible to tell from the information provided.
In the pedigree shown, mating between individuals III 2 and III 3 results in a progeny, which is an affected female. Based on this information, most likely this disorder is:
| 1. | Holandric | 2. | Sex-linked dominant |
| 3. | Sex-linked recessive | 4. | Either 1 or 2 |
In a fruit fly, the eye colour trait is located on X-chromosome and the vestigial wing trait is located on an autosome. What is the possibility that a cross between a white-eyed male fruit fly with vestigial wings and a wild-type female who is heterozygous for both traits will result in a female offspring with vestigial wings and white eyes?
| 1. | 1/16 | 2. | 1/8 |
| 3. | ¼ | 4. | ½ |
The pedigree shows the inheritance of red-green color blindness in a family. If II 3 marries a color-blind man, what is the probability that her first child will be normal?
| 1. | ¼ | 2. | ½ |
| 3. | 2/3 | 4. | ¾ |
The source of any of the genes located on either of the X chromosomes in a female cannot be:
| 1. | Her Mother's Father. | 2. | Her Father's Mother. |
| 3. | Her Mother's Mother. | 4. | Her Father's Father. |
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