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प्रश्न
Name the sex chromosomes in human males and females
उत्तर
Sex chromosomes in human males are X and Y.
Sex chromosomes in human females are XX.
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संबंधित प्रश्न
What is the number of chromosomes in the gametes of human beings?
Match the events given in column A with the phase in mitotic cell division in column B.
| Column ‘A’ | Column ‘B’ | ||
| 1. | Chromosomes get arranged in a horizontal plane at the equator. |
a. | Anaphase |
| 2. | Daughter chromosomes move to the opposite poles of a spindle |
b. | Prophase |
| 3. | Chromosomes become visible as fine, long threads. |
c. | Telophase |
| 4. | Chromosomes lose their distinctiveness and gradually become transformed into a chromatin network. |
d. | Metaphase |
Fill in the blank
The _______ (s) are surrounded by radiating rays called aster
The component which is in the nuclei of cells and carries the hereditary characteristics is called ______.
Choose the correct answer:
Centromere is related to _______________
Mention the contribution of the scientist given below in the study of chromosome:
Strasburger
Choose the correct answer:
Sex of an individual is determined by ____________
Differentiate between
Chromatin and Chromosome.
Give Technical Terms
The stage at which chromosomes occurs reach the opposite poles.
Give Technical Terms
The phase of meiosis at which homologous chromosomes are separated.
Name the following:
Pair of genes responsible for a particular characteristic.
The region of the chromosome where the spindle fibres get attached during cell division ______
An inheritable change in the amount or the structure of a gene or a chromosome is called ______.
Explain the structure of a chromosome.
What' does 'P' and 'Q' represent in the following diagram of X and Y chromosomes? Select the correct option representing, its appropriate description.
Generally, the recessive character is expressed only when present in a double recessive condition i.e. homozygous condition. However, a single recessive gene can express itself in human beings when the gene is present on ______
A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?
