Answer:
Chromosomes
Explanation:
Genes are segments of DNA, but they are found in Chromosomes.
Please let me know if this is any good
the skeleton has been considered
Es un saco con paredes finas que rodea al feto durante el embarazo. El saco contiene líquido amniótico (líquido producido por el feto) y el amnios (membrana que cubre el lado fetal de la placenta), que proteje al feto de lesiones y ayuda a regular su temperatura.
Im not sure about it being developed in a lab but the answer to your question is B