DNA length in human beings

Molecular weight of DNA in an autosome of human beings is 0.5 à— 10 power 12. Determine the number of deoxyribonucleotide pairs in this DNA and calculate the length in both micrometers and inches.

Predicting DNA structure

A double stranded DNA virus has 200,000 base pairs. Determine the number of nucleotides present and the total number of complete spirals. How long will this DNA be?

Predicting base composition in Aspergillus niger and TMV

Analysis of base composition from DNA extraction in Aspergillus niger was seen to contain 37% cytosine. Using this data predict the % of adenine. If the same were detected in Tobacco Mosaic Virus [TMV], will it be possible to predict the % of adenine. Reason.

Genotypic ratio prediction in dominant and recessive alleles in guinea pig

The pelage color in guinea pig is governed by a pair of dominant alleles where a dominant allele B produces black and a recessive allele b produces white. A black pig is crossed with a white one. What fraction of the black F2 is expected to be heterozygous?

Lethality in Mexican hairless breed of dogs

Hairless condition in Mexican hairless breed of dogs is heterozygous [Hh] against the normal homozygous recessive [hh]. Puppies homozygous for H allele are born dead due to abnormalities in mouth and absence of external ears. If the average litter size at weaning is 6 in matings between hairless dogs, what is the expected number of hairless and normal offsprings at weaning from matings between normal and hairless dogs?