Species is the most narrow category
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Answer:
A
Explanation:
During prophase I, the homologous chromosomes condense and become visible as the x shape we know, pair up to form a tetrad, and exchange genetic material by crossing over.
Answer:
ovum fusing with sperm will give zygote (fertilization)
The zygote later on develops to an embryo in the womb after implantation.
Count the ones expressing the trait in the F2 gen. Divide by how many animals there are in F2. Times by 100.