Statement I: | Sickle cell anaemia and Haemophilia are autosomal dominant traits. |
Statement II: | Sickle cell anaemia and Haemophilia are disorders of the blood. |
1. | Sex unspecified | |
2. | Affected individual | |
3. | Consanguineous mating | |
4. | Parent with male child affected with disease |
(a) | Haemophilic son and haemophilic daughter. |
(b) | Haemophilic son and carrier daughter. |
(c) | Normal daughter and normal son. |
(d) | Normal son and haemophilic daughter. |
1. Segregation | 2. Independent assortment |
3. Multiple allelism | 4. Pleiotropy |
The given diagram shows:
1. Exchange of segments between non-sister chromatids of homologous chromosomes during prophase I of first meiosis.
2. Exchange of segments between non-sister chromatids of heterologous chromosomes during prophase I of first meiosis.
3. Reciprocal translocation where there is an exchange of segments between heterologous chromosomes and it is a chromosomal aberration.
4. Inversion, a chromosome aberration, due to non-disjunction of homologues at first meiosis.