Tetrad is made of (a) Four non-homologous chromatids (b)...

Tetrad is made of
(a) Four non-homologous chromatids
(b) Four non-homologous chromosomes
(c) Four homologous chromosomes with four chromatids
(d) Two homologous chromosomes and each with two chromatids

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Key Concepts

Tetrad Formation

Tetrad formation is a key event in prophase I of meiosis where two homologous chromosomes pair up during synapsis, forming a structure that consists of four chromatids. This configuration is essential for genetic recombination as it facilitates crossing over between homologous chromosomes.

Homologous Chromosomes

Homologous chromosomes are pairs of chromosomes that carry the same genes in the same order, one inherited from each parent. Their pairing in meiosis allows for the exchange of genetic material and ensures that each gamete receives one complete set of genetic information.

Sister Chromatids

Sister chromatids are identical copies of a chromosome that are connected by a centromere following DNA replication. During meiosis, each chromosome's two sister chromatids are initially part of a tetrad, and later they separate to ensure accurate distribution of genetic material.

Meiosis

Meiosis is the process by which diploid cells undergo two sequential divisions to produce haploid gametes. Key features of meiosis include the pairing of homologous chromosomes, formation of tetrads, genetic recombination through crossing over, and reduction of the chromosome number.

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