Inheritance and Variation — BIOLOGY STD 12 Science — Question

Following is the DNA sequence representing a part of the gene:
TAC CCC CAC GAG TTA TAT ATA CGG GGG CAT CAT ATG From it derive

1. The RNA transcript
2. The spliced mRNA (assuming that all codons containing a C represent the intron)
3. The number of amino acids it can code for

In a certain population, the frequency of three genotypes is as follows:

Genotypes:	BB	Bb	bb
Frequency:	22%	62%	16%

What is the likely frequency of B and b alleles?

Expand the following and mention one application of each:

1. PCR.
2. ELISA.

What is cryopreservation? Give its one use.

Two claimant fathers filed case against a lady claiming to be the father of her only daughter. How could this case be settled identifying the real biological father?

Is haemophilia in humans a sex-linked or an autosomal disorder? Workout a cross in support of your answer?

Why do gametes produced in large numbers in organisms exhibit external fertilisation?

Differentiate between predators and parasites.

Describe the structure of human sperm.

After a brief medical examination, a healthy couple came to know that both of them are unable to produce functional gametes and should look for an 'ART' (Assisted Reproductive Technique). Name the 'ART' and the procedure involved that you can suggest to them to help them bear a child.