A record of occurrence of a trait in several generations of human family is called pedigree analysis.( ancestral history of an individual) It is Read More …
Category: Principles of inheritance and variation
Write a brief note on Down’s Syndrome
It is an autosomal aneuploidy (Failure of segregation of chromatids during cell division cycle results in the gain or loss of a chromosome ). Read More …
Using Punnet Square, work out the distribution of phenotypic features in the first filial generation after a cross between homozygous female &heterozygous male for a single locus.
Why don’t purelines exhibit genetic variation for natural selection to act?
Purelines appear due to continuous inbreeding or self that makes the similarity in gene pairs. Thus, variations in pure lines are only environmental & Read More …
What are pleotropic genes?
Gene with multiple effect.
Mention the advantages of selecting Pea plant for the experiments by Mendel ?
The advantages of selecting Pea plant for the experiments by Mendel are: Pea plants have a short life cycle. They are easy to grow Read More …
A population census report 2009 – 2010 shows that a major section of the Goan population has migrated to western countries . Predict the effect on the Hardy – Weinberg equilibrium.
The Hardy – Weinberg equilibrium will change.
In an experiment on monohybrid cross a geneticist crossed dominant homozygous white mice with homozygous black mice . Using the punnet square , work out F1 & F2 generations and derive the phenotypic and genotypic ratio
Phenotypic ratio : All White, All Genotypic ratio : All Ww
A child has blood group O. If father has blood group A and mother blood group B, work out the genotypes of the parents and the possible genotypes of the other offsprings. Identify the type of inheritance.
Therefore the genotype of the parents is IA i & I B i The other offsprings will be – AB, B, A, O. Read More …
Which disease there is point mutation , where there is single base pair change in betaglobulin chain of haemoglobin?
Sickle cell anaemia
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