PYQ- NEET- PRINCIPLES OF INHERITANCE AND VARIATION

NEET- PYQ- PRINCIPLES OF INHERITANCE AND VARIATION

MCQ TEST - NEET

 

1. A CROSS IN WHICH AN ORGANISM SHOWING A DOMINANT PHENOTYPE IS CROSSED WITH THE RECESSIVE PARENT IN ORDER TO KNOW ITS GENOTYPE IS CALLED...
   1.   MONOHYBRID CROSS
   2.   BACK CROSS
   3.   TEST CROSS
   4.   DIHYBRID CROSS
2. WHICH ONE OF THE FOLLOWING CONDITIONS OF THE ZYGOTIC CELL WOULD LEAD TO THE BIRTH OF A NORMAL HUMAN FEMALE CHILD?
   1.   TWO X CHROMOSOMES
   2.   ONLY ONE Y CHROMOSOME
   3.   ONLY ONE X CHROMOSOME
   4.   ONE X AND ONE Y CHROMOSOME
3. A NORMAL VISISONED MAN, WHOSE FATHER WAS COLOURBLIND, MARRIES A WOMEN WHOSE FATHER WAS ALSO COLOURBLIND. THEY HAVE THEIR FIRST CHILD, A DAUGHTER. WHAT ARE THE CHANCES FOR THIS CHILD TO BE COLOUR BLIND?
   1.   100%
   2.   0%
   3.   25%
   4.   50%
4. IF BOTH THE PARENTS ARE CARIIERS FOR THALASSEMIA, WHICH IS AN AUTOSOSMAL RECESSIVE DISORDER, WHAT ARE CHANCES OF PREGNANCY RESULTING IN THE CHILD?
   1.   NO CHANCE
   2.   50%
   3.   25%
   4.   100%
5. THE INCORRECT STATEMENT WITH REGARD TO HAEMOPHILIA IS ...
   1.   IT IS SEX LINKED DISEASE
   2.   IT IS RECESSIVE DISEASE
   3.   IT IS DOMINANT DISEASE
   4.   A SINGLE PROTEIN INVOLVED IN THE CLOTTING OF BLOOD IS AFFECTED
6. A PLEIOTROPIC GENE:
   1.   IS A GENE EVOLVED DURING PLIOCENE
   2.   CONTROLS A TRAIT ONLY IN COMBINATION WITH ANOTHER GENE
   3.   CONTROLS MULTIPLE TRAITS IN AN INDIVIDUALS
   4.   IS EXPRESSED ONLY IN PRIMITIVE PLANTS
7. IN HIS CLASSIC EXPERIMENTS ON PEA PLANTS, MENDEL DID NOT USE.
   1.   POD LENGTH
   2.   SEED SHAPE
   3.   FLOWER POSITION
   4.   SEED COLOUR
8. THE TERM LINKAGE WAS COINED BY..
   1.   T. BOVERI
   2.   G. MENDEL
   3.   W. SUTTON
   4.   T.H. MORGAN
9. ALLELES ARE
   1.   DIFFERENT PHENOTYPE
   2.   TRUE BREEDING HOMOZYGOTES
   3.   DIFFERENT MOLECULAR FORMS OF A GENE
   4.   HETEROZYGOUS
10. A MAN WITH BLOOD GROUP A ..MARRIES A WOMEN WITH BLOOD GROUP B. WHICH ARE ALL THE POSSIBLE BLOOD GROUPS OF THEIR OFFSPRINGS?
    1.   A ND B ONLY
    2.   A, B AND AB ONLY
    3.   A, B, AB AND O
    4.   O ONLY
11. MULTIPLE ALLELES ARE PRESENT ...
    1.   ON DIFFERENT CHROMOSOMES
    2.   AT DIFFERENT LOCATION ON SAME CHROMOSOME
    3.   AT THE SAME LOCUS OF THE CHROMOSOME
    4.   ON NON SISTER CHROMATIDS
12. THE MOVEMENT OF A GENE FROM ONE LINKAGE GROUP TO ANOTHER IS CALLED ...
    1.   INVERSION
    2.   DUPLICATION
    3.   TRANSLOCATION
    4.   CROSSING OVER
13. A HUMAN FEMALE WITH TURNERS SYNDROME
    1.   HAS 45 CHROMOSMES WITH XO
    2.   HAS ONE ADDITIONAL X CHROMOSOME
    3.   EXHIBITS MALE CHARACTER
    4.   IS ABLE TO PRODUCE CHILDREN WITH NORMAL HUSBAND
14. SELECT THE INCORRECT STATEMENT
    1.   IN MALE GRASSHOPPER, 50% OF SPERMS HAVE NO SEX CHROMOSOMES
    2.   IN DOMESTICATED FOWLS, SEX OF PROGENY DEPENDS ON THE TYPE OF SPERM RATHER THAN EGG
    3.   HUMAN MALES HAVE ONE OF THEIR SEX CHROMOSOMES MUCH SHORTER THAN ANOTHER
    4.   MALE FRUIT FLY IS HETEROGAMETIC
15. WHAT IS THE GENETIC DISORDER IN WHICH AN INDIVIDUAL HAS AN OVERALL MASCULINE DEVELOPMENT, GYNAECOMASTIA AND IS STERILE?
    1.   KLINEFELTERS SYNDROME
    2.   EDWARDS SYNDROME
    3.   DOWNS SYNDROME
    4.   TURNERS SYNDROME
16. A DISEASE CAUSED BY AN AUTOSOMAL PRIMARY NON DYSJUNCTION IS,
    1.   KLINEFELTERS SYNDROME
    2.   TURNERS SYNDROME
    3.   SICKLE CELL ANAEMIA
    4.   DOWNS SYNDROME
17. WHICH ONE OF THE FOLLOWING IS WRONGLY MATCHED?
    1.   STARCH SYNTHESIS IN PEA: MULTIPLE ALLELES
    2.   XO TYPES SEX DETERMINATION: GRASSHOPPER
    3.   ABO BLOOD GROUPING: CO DOMINANCE
    4.   T.H. MORGAN: LINKAGE
18. WHICH ONE OF THE FOLLOWING IS NOT TRUE FOR EXPERIMENTS OF MENDEL ON PEA?
    1.   HIS EXPERIMENTS HAD LARGE SAMPLING SIZE
    2.   HE CHOSE CHARACTERS OF TWO CONTRASTING STATES
    3.   HE USED TRUE BREEDING LINES
    4.   HIS OBSERVATION WERE BASED ON NATURAL OPEN POLLINATION
19. A GENE SHOWING CODOMINANCE HAS....
    1.   ALLELES TIGHTLY LINKED ON THE SAME CHROMOSOME
    2.   ALLELES THAT ARE RECESSIVE TO EACH OTHER
    3.   BOTH ALLELES INDEPENDENTLY EXPRESSED IN THE HETEROZYGOTE
    4.   ONE ALLELE DOMINANT ON THE ANOTHER
20. WHICH MENDELIAN IDEA IS DEPICTED BY A CROSS IN WHICH THE F1 GENERATION RESEMBLES BOTH PARENTS?
    1.   INCOMPLETE DOMINANCE
    2.   LAW OF DOMINANCE
    3.   INHERITANCE OF ONE GENE
    4.   CO DOMINANCE
21. IF A COLOURBLIND MAN MARRIES A WOMEN WHO IS HOMOZYGOUS FOR NORMAL COLOUR VISISON, THE PROBABILITY OF THEIR SON BEING COLOUR BLIND IS
    1.   0.5
    2.   0.75
    3.   1
    4.   0
22. A TRUE BREEDING PLANT IS
    1.   PRODUCED DUE TO CROSS POLLINATION AMONG UNRELATED PLANTS
    2.   NEAR HOMOZYGOUS AND PRODUCES OFFSPRINGS OF ITS OWN KIND
    3.   ALWAYS HOMOZYGOUS RECESSIVE IN THIS GENETIC CONSTITUTION
    4.   ONE THAT IS ABLE TO BREE
       D ON ITS OWN
23. WHAT MAP UNIT [ CENTIMORGAN ] IS ADOPTED IN THE CONSTRUCTION OF GENETIC MAPS?
    1.   A UNIT OF DISTANCE BETWEEN TWO EXPRESSED GENES, REPRESENTING 100% CROSS OVER.
    2.   A UNIT OF DISTANCE BETWEEN GENES ON CHROMOSOSME, REPRENTING 1% CROSS OVER
    3.   A UNIT OF DISTANCE BETWEEN GENES ON CHROMOSOME, REPRESENTING 50% CROSS OVER.
    4.   A UNIT OF DISTANCE BETWEEN TWO EXPRESSED GENES,REPRENTING 10% CROSS OVER
24. ABO BLOOD GROUPING IS CONTROLLED BY GENE I, WHICH HAS THREE ALLELES AND SHOW DOMINANCE. THERE ARE SIX GENOTYPES. HOW MANY PHENOTYPES IN TOTAL ARE POSSIBLE?
    1.   SIX
    2.   THREE
    3.   FOUR
    4.   FIVE
25. FRUITFLY DROSOPHILA MELANOGASTER WAS FOUND TO BE VERY SUITABLE FOR EXPERIMENTAL VERIFICATION OF CHROMOSOMAL THEORY OF INHERITANCE BY MORGAN AND HIS COLLEAGUES BECAUSE
    1.   IT REPRODUCES PARTHENOGENETICALLY
    2.   A SINGLE MATING PRODUCES TWO YOUNG FLY
    3.   SMALLER FEMALE IS EASSILY RECOGNIZABLEFROM LARGER MALE
    4.   IT COMPLETES LIFE CYCLE IN TWO WEEKS