Answer:
Half-mooned shaped.
Explanation:
Sickle-cell anemia is caused by a mutation in the gene encoding hemoglobin, causing red blood cells to appear half-mooned shaped.
Then country wont have alot of anything because everything would be gone like jobs would be taken and not alot food for everybody
Answer:
Phenotypic ratio - 3 Freckes : 1 No freckles
Explanation:
This question represents a monohybrid cross i.e. involving a single gene coding for possession or not of freckles. The allele for possession of freckles (F) is dominant over the allele for no freckles (f).
In a cross between two HETEROZYGOUS parents i.e. Ff × Ff, each parent will produce gametes with alleles F and f respectively. Using a punnet square (see attached image), four possible offsprings will be produced with genotypes: FF, Ff, Ff and ff.
Based on this genotypes, the phenotypic ratio of the offsprings will be 3:1 where 3 offsprings will possess freckles and 1 will have no freckles.
Cell migration occurs extensively during both gastrulation and organogenesis.
Cell migration occurs extensively during gastrulation and organogenesis. During gastrulation three germ layers are formed. The Ectoderm, mesoderm and Endoderm are formed and these are positioned by the migration of epithelial and mesenchymal cells. During organogenesis organs are formed by the germ layers.
Cells migrate to form a specific organ. Organogenesis is the process happening right after the gastrulation. Cleavage is the process of division of cells without increasing its size. During this process cell migration doesn't happen. Hence all the other options except option D are incorrect.
Learn more about Cell migration here:
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