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प्रश्न
A haemophilic man marries a carrier woman and they have a daughter. What is the probability of their daughter being haemophilic?
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उत्तर
50%
Explanation:
A haemophilic male (XhY) and a carrier lady (XXh) have a 50% of probability of conceiving a haemophiliac daughter. This is because one of the two probable daughter genes codes for haemophilia, whereas the other does not. Half of the daughters are carriers and half are hemophilic.
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संबंधित प्रश्न
Define the term ‘genome’.
Classify the chromosomes on the basis of position of centromere.
Genes G S L H are located on the same chromosome. The recombination percentage is between L and G is 15%, S and L is 50%, H and S are 20%. The correct order of genes is
A B B C C D E F G H I
From the above figure identify the type of mutation and explain it.
Match the column I (Type of chromosome) with column II (name of chromosome).
| Type of chromosome | Name of chromosome | ||
| i. |  |
P. | Acrocentric |
| ii. |  |
Q. | Telocentric |
| iii. |  |
R. | Metacentric |
| iv. |  |
S. | Sub-metacentric |
Read the following statements regarding 'X and Y' chromosomes and select the correct option.
P - Due to presence of large amount of euchrornatin X chromosome is genetically more active.
Q - Due to presence of small amount of heterochromatin Y chromosome is genetically more active.
From the following identify the INCORRECT statement/s with respect to the chromosomes.
i. Chromosomes are capable of self replication and play vital role in heredity, mutation, variation, and evolutionary development of eukaryotic species.
ii. Chromosomes are visible during cell division.
iii. Chemically eukaryotic chromosomes are made of mRNA, histone and non-histone proteins.
iv. The number of chromosomes varies within the population of a particular species.
Extra nuclear chromosomes occur in ______.
How many types of gametes would be produced if the genotype of a parent is AaBB?
Discuss in detail the contributions of Morgan and Sturvant in the area of genetics.
