🐒 Principles of Inheritance and Variation 🐒

Section A-மாணவர்கள் சரியான பதிலை தேர்ந்தெடுக்கவும்

Principles of Inheritance and Variation

1) Haemophilia is more common in males because it is a?
a. Recessive character carried by Y-Chromosome
b. Dominant character carried by Y-Chromosome
c. Dominant trait carried by X-Chromosome
d. Recessive trait carried by X-Chromosome

2) ABO blood group in man is controlled by ?
a. Multiple alleles
b. Lethal genes
c. Sex linked genes
d. Y- linked genes

3) Three children of a family have blood groups A, AB, and B. What could be the genotypes of their parents
a. I^A I^B and ii
b. I^A I^O and I^B I^O
c. I^B I^B and I^A I^A
d. I^A I^A and ii

4) Which of the following is not correct?
a. Three or more alleles of a trait in the population are called multiple alleles
b. A Normal gene undergoes mutations to form many alleles
c. Multiple allelees map at different loci of a chromosome
d. A diploid organism has only two alleles out of many in the population

5) Which of the following phenotypes in the progeny are possible from the parental combination A x B ?
a. A and B only
b. A, B and AB only
c. AB Only
d. A, B, AB and O

6) Which of the following phenotypes is not possible in the progeny of the parental genotypic combination I^A I^O X I^A I^B ?
a. AB
b. O
c. A
d. B

7) Which of the following is true about Rh factor in the offspring of parental combination Dd x Dd (both Rh positive )
a. All will be Rh positive
b. Half will be Rh positive
c. About 3/4 will be Rh negative
d. About one fourth will be Rh negative

8) What can be the blood group of offspring when both parents have AB blood group?
a. AB only
b. A, B, and AB
c. A, B, AB, and O
d. A and B Only

9) 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

10) 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)

பிரிவு B-மாணவர்கள் சரியான பதிலை தேர்ந்தெடுக்கவும்

Principles of Inheritance and Variations

1) In an accident there is great loss of blood and there is no time to analyse the blood group which can be safely transferred?
a. O and Rh negative
b. O and Rh positive
c. B and Rh negative
d. AB and Rh positive

2) Father of a child is colourblind and mother is carrier for colourblindness, the probability of the child being colour blind is
a. 25%
b. 50%
c. 100%
d. 75%

3) A marriage between a colourblind man and a normal woman produces
a. All carrier daughters and normal sons
b. 50% carrier daughters, 50% normal daughers
c. 50% colourblind sons, 50% normal sons
d. All carrier offsprings

4) Mangolism is genetic disorder which is caused by the presence of an extra chromosome number.
a. 20
b. 21
c. 4
d. 23

5) Klinefelters' syndrome is characterized by karyotype of
a. XYY
b. XO
c. XXX
d. XXY

6) Females with Turners' syndorome have
a. Small uterus
b. Rudimentary ovaries
c. Underdeloped breasts
d. All of these

7) Pataus' syndrome is also referred to as
a. 13-Trisomy
b. 18-Trisomy
c. 21-Trisomy
d. None of these

8) Who is the founder of Modern Eugenics movement
a. Mental
b. Darwin
c. Francis Galton
d. Karl pearson

9) Improvement of Human race by encouraging the healthy perons to marry early and produce large number of children is called
a. Positive eugnenics
b. Negative eugenics
c. Positive euthenics
d. Positive euphenics

10) The ...... deals with the control of several inherited human diseases especially inborn errors of metalolism
a. Euphenics
b. Eugenics
c. Euthenics
d. All of these

11) " Universal Donor " and " Universal Recipients " blood group are ...... and ...... respectively
a. AB, O
b. O, AB
c. A, B
d. B, A

12) Co-dominant blood group is
a. A
b. AB
c. B
d. O