Match the terms in Column I with their description in Column II and choose the correct option.
Column I | Column II | ||
A. | Dominance | 1. | Many govern a single character |
B. | Codominance | 2. | In a heterozygous organism, only one allele expresses itself |
C. | Pleiotropy | 3. | In a heterozygous organism, both alleles express themselves fully |
D. | Polygenic inheritance | 4. | A single gene influences many characters |
A | B | C | D | |
1. | 2 | 3 | 4 | 1 |
2. | 4 | 1 | 2 | 3 |
3. | 4 | 3 | 1 | 2 |
4. | 2 | 1 | 4 | 3 |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Sickle cell anaemia has not been eliminated from the African population because:
1. It is controlled by recessive genes
2. It is not a fatal disease
3. It provides immunity against malaria
4. It is controlled by dominant genes
Select the incorrect statement:
1. | Human males have one of their sex-chromosome much shorter than the other. |
2. | Male fruit fly is heterogametic. |
3. | In male grasshoppers, 50% of sperms have no sex chromosome. |
4. | In domesticated fowls, the sex of progeny depends on the type of sperm rather than the egg. |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
What map unit (Centimorgan) is adopted in the construction of genetic maps?
1. | A unit of distance between genes on chromosomes, representing 50% cross-over. |
2. | A unit of distance between two expressed genes, representing 10% cross-over. |
3. | A unit of distance between two expressed genes, representing 100% cross-over. |
4. | A unit of distance between genes on chromosomes. representing 1% cross-over. |
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by:
1. | Only daughters | 2. | Only sons |
3. | Only grandchildren | 4. | Both sons and daughters |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
All genes located on the same chromosome:
1. | Form different groups depending upon their relative distance |
2. | Form one linkage group |
3. | Will not from any linkage groups |
4. | Form interactive groups that affect the phenotype |
Conditions of a karyotype 2n +1, 2n –1 and 2n + 2, 2n – 2 are called:
1. | Aneuploidy | 2. | Polyploidy |
3. | Allopolyploidy | 4. | Monosomy |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is:
1. | Autosomal dominant | 2. | Autosomal recessive |
3. | Sex-linked dominant | 4. | Sex-linked recessive |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
In a certain taxon of insects, some have 17 chromosomes and others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are:
1. males and females, respectively
2. females and males, respectively
3. all males
4. all females
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The inheritance pattern of a gene over generations among humans is studied by pedigree analysis. The character studied in the pedigree analysis is equivalent to:
1. | quantitative trait | 2. | Mendelian trait |
3. | polygenic trait | 4. | maternal trait |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.