Inheritance Questions

A human male produces sperms with the genotypes AB, Ab, aB and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person?

Inheritance of skin colour in humans is an example of:

Grain colour in wheat is determined by three pairs of polygenes. Following the cross AABBCC (dark colour) x aabbcc (light colour), in $F_2$ generation what proportion of the progeny is likely to resemble either parent?

A man whose father was colour blind marries a woman who had a colour blind mother and a normal father. What percentage of male children of this couple will be colour blind?

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?

Match the terms in column I with their description in Column II:
Column I: (a) Dominance, (b) Codominance, (c) Pleiotropy, (d) Polygenic inheritance
Column II: (i) Many genes govern a single character, (ii) In a heterozygous organism only one allele expresses itself, (iii) In a heterozygous organism both alleles express themselves fully, (iv) A single gene influences many characters

Which of the following most appropriately describes haemophilia?

Pick out the correct statements:(i) Haemophilia is a sex – linked recessive disease(ii) Down’s syndrome is due to aneuploidy(iii) Phenylketonuria is an autosomal recessive gene disorder(iv) Sickle cell anaemia is an autosomal recessive gene disorder