Which of the following statements is true of monozygotic twins? one ovum has been fertilized occurs during meiosis two ova have been fertilized have chromosomal abnormalities
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Monozygotic (identical) twins arise when a single egg, fertilized by a single sperm, divides early in development, giving rise to two genetically identical embryos. A recent study examined a pair of monozygotic twins in which one of the twins had trisomy 21 and the other twin had two normal copies of chromosome 21. Explain how two identical twins could differ in their number of chromosomes
Supreeta N.
Madhur L.
Which of the following statements about fertilization is TRUE? After fertilization, fertilized cells will immediately undergo meiosis. Homologous chromosome pairs from each gamete fuse during fertilization. Fertilization results in haploid daughter cells. The zygote resulting from fertilization has the same number of chromosomes as either parent's somatic cells.
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