4
Twenty-three chromosomes are in a cell that is formed from a sperm and egg cell.
50
50
50
23
there are approximately 69 in a sperm cell and approximately chickens in an egg
23
The egg cell of a weed will typically have half the number of chromosomes as a normal body cell of that weed species. This is because the egg cell undergoes meiosis to reduce the chromosome number in preparation for fertilization.
46
All human gametes (sex cells), which means egg cells and sperm cells, have 23 chromosomes. When the sperm fertilises the egg, the 23 chromosomes from the egg cell and the 23 chromosomes from the sperm cell join to make cells with 46 chromosomes. In summary, all cells in the human body have 46 chromosomes, except sperm cells and egg cells, which have 23.
The egg cell would also have 20 chromosomes because during sexual reproduction, each parent contributes half of the chromosomes to the offspring. This ensures the offspring will have the correct number of chromosomes for the species, in this case, 20 chromosomes for the lizard.
There are 23 chromosomes in each the sperm and the egg. When they fuse, the resulting embryo will have 46 chromosomes.