Answer:
The allele carrying the trait for blond hair is heterozygous recessive.
Explanation:
Since the allele was recessive, it could not express itself in the presence of the dominant allele which is for Brown hair in the parents. But due to random mating, there was a possibility of 25% that an upcoming child will have blond hair, due to the crossing of two recessive alleles.
Answer:
Las células binucleadas podrían ser la clave para la regeneración del corazón. Así lo señalan científicos del Instituto de Bioingeniería de Cataluña (IBEC) y el Centro de Medicina Regenerativa de Barcelona (CMRB). La investigación se ha realizado en un pez cebra y ha revelado un mecanismo que genera células de 2 núcleos.
Explanation:
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B. Many stars and solar systems make up galaxies and many galaxies make up the universe.
Answer:
Connective
Explanation:
Connective tissues are repeated arrangement of structure that binds and supports body parts and fit them into their organ shape. It component includes the cell and extracellular matrix (protein fibres and proteoglygans). They provides support and framework for the body, maintaining body forms and also mediate the exchange of nutrients between their circulation and other tissues.
There are 8,324,608 possible combinations of 23 chromosome pairs. As a result, two gametes virtually never have exactly the same combination of chromosomes. Each chromosome contains dozens to thousands of different genes.
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