Q & AWhich is a homologous chromosome pair? chromatid zygote gamete tetrad

Which is a homologous chromosome pair? chromatid zygote gamete tetrad

A homologous chromosome pair refers to a pair of chromosomes that are similar in size, shape, and genetic content. They are derived from each parent, with one chromosome originating from the mother and the other from the father.

Out of the options you provided, “tetrad” is the term that relates to homologous chromosome pairs. During a specific stage of cell division called meiosis, homologous chromosomes come together and align, forming a structure known as a tetrad. A tetrad consists of two homologous chromosomes, each composed of two sister chromatids. This alignment allows for the exchange of genetic material between the homologous chromosomes, contributing to genetic diversity in offspring.

What is a homologous chromosome pair?

Homologous chromosomes come together during sexual reproduction and are derived from each parent. In humans, for example, the diploid cells of the body contain 23 pairs of chromosomes, with one chromosome in each pair originating from the mother and the other from the father.

Homologous chromosomes have corresponding genes at the same loci (positions) along their length. While the genes may have slight variations or different alleles, they carry the same type of genetic information and determine the same traits. One chromosome in the pair is called the maternal chromosome, while the other is called the paternal chromosome.

During the process of meiosis, homologous chromosomes come together and align, forming a structure known as a tetrad. This alignment allows for the exchange of genetic material between the homologous chromosomes, a process called crossing over. This genetic recombination contributes to the genetic diversity observed in offspring.

Homologous chromosome pairs play a crucial role in inheritance and the transmission of genetic information from one generation to the next. They are involved in the process of sexual reproduction, as they pair up during meiosis and segregate into different gametes (sperm and egg cells). This ensures that each gamete receives one member of each homologous chromosome pair, resulting in offspring with a combination of genetic material from both parents.

Which of the following is a homologous chromosome pair?

a) Chromatid

b) Zygote

c) Gamete

d) Tetrad

Answer:

d) Tetrad

Explanation:

A homologous chromosome pair refers to a pair of chromosomes that are similar in size, shape, and genetic content. They are derived from each parent, with one chromosome originating from the mother and the other from the father. During a specific stage of cell division called meiosis, homologous chromosomes come together and align, forming a structure known as a tetrad. A tetrad consists of two homologous chromosomes, each composed of two sister chromatids. This alignment allows for the exchange of genetic material between the homologous chromosomes, contributing to genetic diversity in offspring.

Option a) Chromatid: A chromatid refers to one of the two identical copies of a chromosome that are joined at the centromere. Chromatids are part of a duplicated chromosome and are not necessarily associated with homologous chromosomes.

Option b) Zygote: A zygote is a cell formed by the fusion of two gametes (sperm and egg) during fertilization. It is the initial stage of a developing organism and does not represent a homologous chromosome pair.

Option c) Gamete: A gamete refers to a reproductive cell, such as a sperm or egg, that contains half the number of chromosomes found in somatic cells. Gametes are involved in sexual reproduction, but they are single chromosomes and not paired homologous chromosomes.

Option d) Tetrad: A tetrad represents the alignment of homologous chromosome pairs during meiosis. It consists of two homologous chromosomes, each composed of two sister chromatids, and allows for genetic exchange between the chromosomes. Therefore, tetrad represents a homologous chromosome pair.

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