If the pollen is homozygous the offspring is white
Answer:
receptor down-regulation
Explanation:
Downregulation is a control mechanism by which a cell decreases the amount of a cellular component, such as RNA or protein, in response to an external variable. In contrast, a reactive increase of a cellular component is called upregulation. An example of downregulation occurs when insulin binds to its receptor and the complex is endocyted in the cell in response to hormonal signaling.
25.A
26.C
27.A
28.C
Hope I’m not too late
Gametes are haploid cells, the haploid number is n = 23, and each parent could provide half of the centromeres. Hence, the fraction of a man’s gametes that contain centromeres inherited from the same parent is 1/2²³.
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We know that the diploid number in humans is 2n=46. This means that the haploid number is n=23.
We need to know the fraction of a man’s gametes that contains centromers inherited from the the father or the mother.
A gamete has 23 chromosomes.
<em>Half of the centromers could be inherited by the </em><em>father (1/2)</em><em> and half by the </em><em>mother (1/2)</em><em>. </em>
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So the fraction should be 1/2ⁿ = 1/2 ²³
- 1/2 because half of the centromers could be inherited by the father or the mother
- n because is the haploid number of chromsomes in the gamete ⇒ n = 23
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Related link: brainly.com/question/1454118 referrer=searchResults