In humans, albinism (unpigmented skin, hair, and eyes) is due to an enzymatic deficiency, and it is an autosomal recessive trait. Suppose that in a small country of one million people (“Generation 1”), there are 500 aa albinos and 9000 Aa heterozygous carriers. Has the frequency of allele a changed between Generations 1 and 2? 

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#Question id: 5048

#Unit 5. Developmental Biology

when a cell or tissue is capable of differentiating autonomously even when placed into another region of the embryo or a cluster of differently specified cells in a petri dish. This cell or tissue said to be-

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#Question id: 31236

#Unit 2. Cellular Organization

Centromeres associated cohesins are specifically protected by protein phosphatase 2A (PP2A). Protein phosphatase 2A (PP2A) is recruited to centromeric regions in human cells from G2 through metaphase by a member of a family of PP2A targeting factors known as: 

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#Question id: 4589

#Unit 11. Evolution and Behavior

Darwin used the phrase "descent with modification" to explain ________.

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#Question id: 12509

#Unit 8. Inheritance Biology

In this pedigree I 1 and II 2 have Becker muscular dystrophy which shows X-linked recessive inheritance. III 2 has oculocutaneous albinism which shows autosomal recessive inheritance with an incidence in the general population of 1 in 10 000. The disease status for both Becker muscular dystrophy and oculocutaneous albinism is unknown for IV 1 and IV 2.

What is the probability that IV 1 is a carrier of oculocutaneous albinism? 

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#Question id: 33443

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is not an unusual base?