Question

If a tetraploid plant contains 48 chromosomes in its nucleus, then number of chromosomes in the egg cell and in a synergid will be
A. 24 and 48
B. 24 and 24
C. 48 and 48
D. 48 and 24

Answer 1

Hint: The tetraploid is the four spores delivered after meiosis of yeast or other Ascomycota, Chlamydomonas or another alga, or a plant. After parent haploids mate, they produce diploids. Under proper ecological conditions, diploids sporulate and go through meiosis. The meiotic items, spores, stay bundled in the parental cell body to create the quadruplicate.

Complete answer:
The plant is tetraploid (4n) and there are 48 chromosomes in the core. The egg cell and the synergid are delivered by meiotic division and are haploid. Thus, 48/2=24 chromosomes in the egg and synergid.
All the cells in the creating branch will be tetraploid (4n) with four arrangements of chromosomes. This incorporates cells of the stem, leaves, blossoms, and organic products. Gametes (egg and sperm) delivered by a blossom on this tetraploid branch will be diploid (2n) with two arrangements of chromosomes. A blossom on the typical diploid (2n) branch will create haploid (n) gametes containing one bunch of chromosomes.
The incipient organism sac contains 32 chromosomes and 8 haploid cores, so every core must contain 4 chromosomes. Consequently, the egg cell has 4 chromosomes, the synergid cell has 4 chromosomes, and so forth. The endosperm mother cell has two polar cores so it contains a sum of 8 chromosomes.

Hence, the correct answer is option (B).

Note: In the tetraploid plant, the chromosomes in an egg cell and synergid will be 48/2=24 chromosomes. Synergid cells are two particular cells that lie neighboring the egg cell in the female gametophyte of angiosperms and assume a fundamental function in dust tube direction and capacity. The synergids work in the fascination and direction of the dust cylinder to the megagametophyte through the micropyle. The egg and focal cells in the tetraploid plants were bigger than the related cells in their comparing diploids, which is predictable with the phone size increment in yeast polyploids and stomatal cells of A.