An abnormal human baby with ‘XXX’ sex chromosomes was born due to
Select the correct match.
A disease caused by an autosomal primary non disjunction is
Select the Correct match.
Males are heterogametic in
All the fertilised eggs develop into females in
If a colorblind man marries a normal woman without any history of colorblindness in her family, then their sons will be
Down’s syndrome is due to
One of the X chromosomes is absent in which of the following chromosomal disorders?
Queen Victoria was a carrier of
Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement.
Which of the following pairs is wrongly matched ?
In the following human pedigree, the filled symbols represent affected individuals. Identify the type of disorder represented in the pedigree chart.
The following figure represents sex determination in
In which genetic condition, each cell in the affected person, has three sex chromosomes XXY ?
The recessive genes located on X-chromosome in humans are always:
Females are heterogametic in
Heterozygous ( Hb A Hb S ) individuals for Sickle cell anaemia
Mark the wrong statement about Sickle cell anaemia.
A man with red-green colour-blindness marries a normal woman with no history of colour-blindness in her family. What would the expected ratio of normal sons, colour-blind sons, normal daughters and carrier daughters in their children?
X body was first observed in spermatozoa of insects by
What is common between Klinefelter’s syndrome and Turner’s syndrome?
A woman would be haemophilic only when her
Which of the following is an autosomal recessive disorder?
Sickle cell anaemia results from the single amino acid substitution in the
Which one of the following conditions of a zygotic cell will lead to the birth of a female chicken?
Turner’s syndrome is caused due to
Match the following and choose the correct option. Column I Column II (a) Hypertrichosis (i) Sex-linked recessive disorder (b) Phenylketonuria (ii) Autosomal dominant disorder (c) Myotonic dystrophy (iii) Autosomal recessive disorder (d) Haemophilia (iv) Y-linked dosorder
Sex determination mechanism in honey bees is
A man and woman who do not show any symptoms of an inherited disease have 10 offspring – 6 boys and 4 girls. Three of the boys suffer from the disease, while none of the girls are affected. The disorder is most likely to be
All the following are chromosomal disorders, except
Which of these pairs is correctly matched?
Find out the mismatch.
Which of the following is mismatched pair of disease and its related symptom?
A marriage between a colour blind man and a hormozygous normal woman produces .
In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.
Select the incorrect statement with regard to haemophilia.
Down’s syndrome in humans is due to
Which one is the incorrect statement with regard to the importance of pedigree analysis?
A colour blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind ?
A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?
A human female with Turner’s syndrome
Pick out the correct statements. (1) Haemophilia is a sex-linked recessive disease. (2) Down’s syndrome is due to aneuploidy. (3) Phenylketonuria is an autosomal recessive gene disorder. (4) Sickle cell anaemia is an X-linked recessive gene disorder.
Which of the following most appropriately describes haemophilia?
If a colour – blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour – blind is
Select the incorrect statement.
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia, and is sterile?
Match the items of column I and column II and select the most appropriate option. Column I Column II (a) X body (i) Hugo de Vries (b) Phenylketonuria (ii) Henking (c) Mutations (iii) Haplodiploidy (d) Honeybee (iv) Pleiotropy
Sickle cell anaemia occurs due to a mutation that changes a codon on mRNA from
A man with red-green colorblindness marries a carrier woman. What would the expected ratio of normal sons, color-blind sons, normal daughters, carrier daughters and color-blind daughters ?
Match the items of column I with column II Column I Column II (a) XX – XO method of sex determination (i) Turner’s syndrome (b) XX – XY method of sex determination (ii) Female heterogametic (c) Karyotype 45 (iii) Grasshopper (d) ZW – ZZ method of sex determination (iv) Female homogametic Select the correct option from the following :
Select the correct option :
What is the genetic disorder in which the affected individual is short statured with small round head, furrowed tongue and partially open mouth?
A person suffering from phenylketonuria lacks the enzyme that converts
In the following human pedigree, the filled symbols represent affected individuals. Mark the correct statement with regard to the pedigree chart.
Which of the following is an autosomal dominant disorder?
Mark the correct combination
Which of the following is a quantitative, blood related mendelian disorder?
Sickle cell anaemia occurs due to the single base substitution at the sixth codon of the beta globin gene from
Select the correct pair about sex determination.
Which of the following represents consanguineous mating?
A male human with a Barr body in his somatic cells exhibits
Colourblindness occurs in percent of females.
Select the correct pair about sex determination.
A person suffering from phenylketonuria lacks the enzyme that converts
Why is haemophilia mostly observed in men?
A man is observed to have an additional copy of X chromosome. Which of the following characters are associated with this condition? (a) Gynecomastia (b) Short stature (c) Sterility (d) Overall feminine development
Which of the following is an example of pleiotropy?
A human being exhibiting Turner’s syndrome is a
Mark the incorrect statement about pedigree analysis.
When a trait is carried by the carrier female to some of the male progeny but not female progeny, the trait may be
The total number of chromosome is same in both males and females in
In Drosophila , the sex is determined by
A man has enlarged breasts, sparse hairs on the body and sex chromosomal formula XXY. He is suffering from
Sex determination in grasshoppers, humans, and Drosophila is similar because
Match the following and choose the correct option. Column I Column II (a) Hypertrichosis (i) Sex-linked recessive disorder (b) Phenylketonuria (ii) Autosomal dominant disorder (c) Myotonic dystrophy (iii) Autosomal recessive disorder (d) Haemophilia (iv) Y-linked dosorder
Sickle cell anaemia is
The number of chromosomes in the somatic cells of male grasshopper and female grasshopper are respectively
One of the two X chromosomes of a woman has one allele for haemophilia and one allele for colourblindness. Her other X chromosome has normal alleles. She marries a normal man. Which of the following is most likely about their offspring?
Klinefelter’s Syndrome is characterised by
Male heterogamety is observed in (a) XX-XY type (b) XX-XO type (c) ZW-ZZ type (d) Haplodiploidy
Which of the following is not a blood-related disorder?
A shaded circle in the pedigree analysis chart represents
Which of the following is caused by the absence of a sex chromosome?
If a colour-blind female marries a normal male. The probability of their daughter(s) being colourblind is
Sickle cell anaemia is caused by the substitution of Glu by at the sixth position of the bet-globin chain of the haemoglobin molecule.
The abnormal condition when the vestigial mammary glands of man become female like is called
Select the incorrect statement from the following.
In which of these disease’s does the patient doesn’t have the same number of chromosomes as the rest?
A normal visioned man whose father was colour blind marries a normal vision woman whose father was also colour blind. They have their first child as daughter. What are the chances that this child would be colour blind?
Which one of the following conditions indicates Klinefelter’s syndrome?
Which of the following is incorrect about Phenylketonuria?
Daughter will be colour blind when
What will be percentage inheritance of a disorder from an X-linked diseased father to his son?
For a son to haemophilic
In sickle-cell anaemia, the shape of RCBs under oxygen tension becomes
Select the wrong pair from the following.
