Which of the following are correct about sex-linked recessive inheritance? P. Most affected individuals are males. Q. Affected females come from affected fathers and affected or carrier mothers. R. The sons of affected females should be affected. S. The trait does not skip generations.

Why would you predict that half of the human babies born will be males and half will be females?

Hemophilia is a recessive X-linked trait in humans. If a heterozygous woman has children with a normal man, what are the odds of the following combinations of children? P. An unaffected daughter or son Q. Two out of five offsprings that are affected

Philadelphia chromosome is generated by translocation between

If two populations are merged, each with different frequencies of an allele at a locus, and randomly mating occurs immediately, how long will it take to achieve a Hardy-Weinberg equilibrium in the new population?

Which of the following is not true about autosomal dominant traits?

Which statement about allele frequencies is not true?

Which one of the following is a cause of mutation in animals?

The bridge-fragment configuration at anaphase-1 is characteristic of

Which of the following are correct? P. Classical Mendelian traits are qualitative in nature. Q. Qualitative traits show discontinuous variations. R. Qualitative traits are polygenic traits. S. Qualitative traits are referred to as metric traits.

If A/A/.B/B is crossed to the a/a.b/b, and the F₁ is test crossed. What percent of the test cross progeny will be a/a.b/b if the two genes are P. unlinked Q. completely linked (no crossing over at all) R. 10 map units apart S. 24 map units apart

Down’s syndrome is characterised by

Genetic diversity is required for natural selection to act, but natural selection can reduce or eliminate diversity. What process can restore genetic diversity to a population?

When a man with hypertrichosis marries a normal woman, what percentage of their sons would be expected to have hairy ears?

Which of the following is not required for a population at Hardy-Weinberg equilibrium?

Two genes are located on the same chromosome and are known to be 12 map units apart. An AABB individual is crossed to an aabb individual to produce AaBb offspring. The AaBb offsprings are then crossed to aabb individuals. If this cross produces 1000 offsprings, what is the predicted number of offsprings with each of the four genotypes: AaBb, Aabb, aaBb and aabb?

The presence of recessive part in a large population is found to be 16%. The frequency of dominant allele in that population is

The genetic code that directs protein synthesis in humans is found in

A disease in many Africans, which reduces oxygen uptake by blood and is a genetic disease is called

In Drosophila melanogaster, cherub wings (ch), black body (b) and cinnabar eyes (cn) are recessive to their corresponding alleles (represented as ch+, b+ and cn+, respectively) and are all located on chromosome 2. Homozygous wild type flies were mated with cherub, black and cinnabar flies and the resulting F1 females were test crossed with cherub, black and cinnabar males. The following progenies were produced from the test cross: ch b+ cn 110 ch+ b+ cn+ 780 ch+ b cn 70 ch+ b+ cn 6 ch b cn 769 ch b+ cn+ 60 ch+ b cn+ 111 ch b cn+ 9 Total 1915 Of these three genes, which one is in the middle?