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If there are 13 pairs of homologous chromosomes in the parental cell how many chromosomes are there in a sperm?
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∙ 12y ago
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∙ 12y ago
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When do homologues pair?
A homologous pair is a pair of chromosomes that exist in diploid cells. One of the pair you inherit from your father, the other from your mother. A human has 22 pairs of homologous chromosomes (these do not include sex chromosomes). They are the same length and shape. They also share the same genes. The sequences of the genes may be different, which is what results in genetic variation, but the genes are the same.
The exceptions to the rule that every chromosome is part if a homologous pair are the?
The exceptions to the rule that every chromosome is part of a homologous pair are the gametes. Gametes are eggs and sperm, and each cell has only 23 chromosomes, which form pairs in the zygote after fertilization.
How many homologous chromosomes do you have in your gametes?
Number of Homologous Chromosomes in GametesGametes contain 23 paired chromosomes. Gametes are haploid because they are sex cells to be combined with other haploid sex cells of the opposite gender to form the required 46 chromosomes that form a zygote (a future child), which is diploid.
Why are no two gametes exactly alike?
Each sperm and egg cell are genetically different, because during meiosis, recombination by crossing over happens. Chromosomes exchange genetic material between TWO chomatids of homologous chromosomes out of four in a bivalent. Thus 50% gametes are parental and 50% new combinations.
If an organism has a diploid or 2n number of 16 how many chromosomes do its sperm and egg cells contain?
Diploid cells contain twice the number of chromosomes as haploid cells. Sex cells (sperm and egg) are haploids. Therefore, if the diploid number is 16, sperm and egg cells must contain 8 each.
If there are 13 pairs of homologous chromosomes in a primary spermatocyte how many chromosomes are there in a sperm?
The haploid number is 13 and the diploid number is 26
When do homologues pair?
A homologous pair is a pair of chromosomes that exist in diploid cells. One of the pair you inherit from your father, the other from your mother. A human has 22 pairs of homologous chromosomes (these do not include sex chromosomes). They are the same length and shape. They also share the same genes. The sequences of the genes may be different, which is what results in genetic variation, but the genes are the same.
How many chromosomes pairs are in a sperm Cell?
A sperm cell contains 23 [unpaired] chromosomes.
Is homologous chromosomes only present in cells that undergo meiosis?
Usually they dont as homologous chromosomes form bivalents with other homologous chromosomes and crossing over occurs between the 2. But if a chiasmata does form between the t homologous chromosomes they can change information.
The exceptions to the rule that every chromosome is part if a homologous pair are the?
The exceptions to the rule that every chromosome is part of a homologous pair are the gametes. Gametes are eggs and sperm, and each cell has only 23 chromosomes, which form pairs in the zygote after fertilization.
When and where could you find a homologous pair of chromosomes?
A pair of homologous chromosomes can be found within any regular diploid cell. Basically, this is any cell in the human body that is not egg or sperm.
How many chromosomes does a human sperm or egg cell contain?
The human egg or sperm cell is haploid and contains 23 chromosomes. After fertilization (egg and sperm fusion), the zygote will have 46 chromosomes (23 pairs).
How many chromosomes do a fertilized egg of a human have?
After fertilization all normal human cells contain the same number of chromosomes as the cells of an adult human - 23 pairs of chromosomes, for a total of 46 chromosomes. Before fertilization the ovum contains only 23 chromosomes. A second 23 chromosomes are provided by the sperm during fertilization.
How many chromosomes are there inside the nucleus of a sperm cell?
23 pairs
How many total chromosomes are in each body cell?
all cells of body except egg and sperm have 23 pairs of chromosomes i.e. 46...but egg and sperm have 23 chromosomes
How many homologous chromosomes do you have in your gametes?
Number of Homologous Chromosomes in GametesGametes contain 23 paired chromosomes. Gametes are haploid because they are sex cells to be combined with other haploid sex cells of the opposite gender to form the required 46 chromosomes that form a zygote (a future child), which is diploid.
Why are no two gametes exactly alike?
Each sperm and egg cell are genetically different, because during meiosis, recombination by crossing over happens. Chromosomes exchange genetic material between TWO chomatids of homologous chromosomes out of four in a bivalent. Thus 50% gametes are parental and 50% new combinations.
