The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?

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#Question id: 6971

#SCPH01 Biochemistry

Neural crest cells taking the dorso-lateral route will become:

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#Question id: 19355

#SCPH06 I Botany

Genes are often transferred from eukaryotes into prokaryotes with the prime objective

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#Question id: 5242

#SCPH28 | Zoology

Auxotrohic bacteria plating on different medium, it is observed that colonies grow on minimal plus threonine only, no colony on minimal plus leucine and no colonies grow on minimal medium cystein only. What are the actual genotypes of auxotroph?

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#Question id: 5765

#SCPH28 | Zoology

How many different trisomics could be formed in a plant with a diploid number of 12?

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#Question id: 4564

#SCPH06 I Botany

Who would have proposed that the boundaries between each stratum mark the occurrence of different localized floods?