Table of Contents
- 1 How many chromosomes are in the leaf cells of an onion?
- 2 How many chromosomes are found in an onion gamete?
- 3 How many chromosomes are present at anaphase If a cell contains 20 chromosomes at the start of mitosis?
- 4 What is the chromosome number of an onion root cell during anaphase?
- 5 What is the number of chromosomes in the root cell?
How many chromosomes are in the leaf cells of an onion?
In onion, it has 16 chromosomes in the root and leaf while 8 chromosomes in the pollen grain.
How many chromosomes are present at anaphase I if a cell contains 16 chromosomes at the start of meiosis?
During anaphase, we now have a total of 16 chromosomes and 16 chromatids – in short, each chromatid is now a chromosome. Similarly, in humans, there are 92 chromosomes present and 92 chromatids during anaphase. These numbers remain the same during telophase.
How many chromosomes are in a leaf cell?
16 chromosomes
The leaf is diploid, with 16 chromosomes. Microspores have half the number of chromosomes as haploids. As a result, the microspore chromosome is 16/2=8.
How many chromosomes are found in an onion gamete?
A diploid cell of an onion has 16 chromosomes. Haploid gametes are produced during meiosis, which is a type of cell division that reduces the number of chromosomes in a parent diploid cell by half. When meiocyte divides to form gametes, the chromosomes become half i.e., 8.
What cell has 16 chromosomes?
Onion root tip cells
Onion root tip cells have 16 chromosomes in each cell.
What would be chromosome number in the antipodal cells of a plant with 16 chromosomes the root tip cells?
The diploid (2n) number of chromosomes in an angiospermic plant is 16. So, the number of chromosomes in endosperm (3n) is 24 and that in antipodal cells (2n) is 16.
How many chromosomes are present at anaphase If a cell contains 20 chromosomes at the start of mitosis?
If there are 20 centromeres seen in anaphase, then there are 20 chromosomes in the dividing cell. Thus each pole of the dividing cell will receive 10 chromatids: each chromatid will now become a chromosome for daughter cell.
How many chromosomes are present in plants?
If the diploid chromosome number of a flowering plant is 24, then the somatic cells of the plant each contain 24 chromosomes (12 maternal and 12 paternal). Each of the three haploid nuclei in the germinated pollen grain must contain 12 chromosomes, and each of the 8 nuclei within the embryo sac contain 12 chromosmes.
How many chromosomes will have the cell of onion at G1?
If the Chromosome number in root tip cell of onion is 16, then it will have 16 chromosomes in the G1 phase, as well as after S phase, and even after M- phase.
What is the chromosome number of an onion root cell during anaphase?
16
The number of onions chromosomes are 16. Root tips of onion are used because the cells there are actively growing and dividing, giving a good chance to see chromosomes during different stages of cell division.
How many chromosomes are there in a leaf cell of onion?
Let it be known that the somatic (body) cells have diploid condition (being produced mitotically) and germ (gamete) cells have haploid condition (being produced meiotically). So, leaf cell of onion being a body part of the plant, will have same number of chromosomes as in the root, i.e. 16 chromosomes (same for all shoot parts).
What is the number of chromosomes in pollen grains?
If there are 16 chromosomes in a vegetative cell of a plant (vegetative cells are diploid, i.e. 2n). Then, the number of chromosomes in Pollen grains will be 8 because pollen grains form after meiosis in microspore mother cells (2n).
What is the number of chromosomes in the root cell?
The chromosomes in root cell will be 16 as root cell is a diploid cell. The chromosomes in pollen grain will be 8 as pollen grain is a haploid cell.
How many chromosomes in a vegetative cell of pea plant?
There are 16 chromosome in a vegetative cell of pea plant so how many chromosome in antipodal cell, endosperm, egg cell, pollen grains? If there are 16 chromosomes in a vegetative cell of a plant (vegetative cells are diploid, i.e. 2n).