. If the childs blood group is ‘O’ and fathers blood group is ‘A’ and mother’s blood group is ‘B’ the genotype of the parents will be a) I A I A and I B I o b) I A I o and I B I o c) I A I o and I o I o d) I o I o and I B I B . XO type of sex determination and XY type of sex determination are examples of a) Male heterogamety b) Female heterogamety c) Male homogamety d) Both (b) and (c) . In an accident there is great loss of blood and there is no time to analyse the blood group which blood can be safely transferred?
a) O and Rh negative b) O and Rh positive c)B and Rh negative d) AB and Rh positive . Father of a child is colourblind and mother is carrier for colourblindness, the probability of the child being colourblind is a) % b) % c) % d) % . A marriage between a colourblind man and a normal woman produces a) All carrier daughters and normal sons b) % carrier daughters and % normal daughters c) % colourblind sons and % normal sons d) All carrier offsprings . Down's syndrome is a genetic disorder which is caused by the presence of an extra chromosome number a) b) c) d) .
Klinefelters’ syndrome is characterized by a karyotype of a) XYY b) XO c) XXX d) XXY . Females with Turners’ syndrome have a) Small uterus b) Rudimentary ovaries c) Underdeveloped breasts d) All of these . Pataus’ syndrome is also referred to as a) -Trisomy b) -Trisomy c) -Trisomy d) None of these . “Universal Donor” and “Universal Recipients” blood group are a) AB, O b) O, AB c) A, B d) B, A .
ZW-ZZ system of sex determination occurs in a) Fishes b) Reptiles c) Birds d) All of these . Co-dominant blood group is a) A b) AB c) B d) O . Which of the following is incorrect