When the gametes join they form a cell called a zygote. Human sperm and eggs contain 23 chromosomes. Human zygotes contain 46 chromosomes.
How many chromosomes does a zygote have quizlet?
A human zygote (fertilized egg), like most other human cells, contains 46 chromosomes.
Does a zygote have 23 or 46 chromosomes?
During fertilization, gametes from the sperm combine with gametes from the egg to form a zygote. The zygote contains two sets of 23 chromosomes, for the required 46. Most women are 46XX and most men are 46XY, according to the World Health Organization.
How many chromosomes does a zygote get from the father quizlet?
Thousands of genes reside on each chromosome. The male parent and the female parent each contribute 23 chromosomes yielding 23 pairs total. The 23 pairs of chromosomes are present inside of the zygote. You just studied 61 terms!
Does sperm fertilize the egg?
If one sperm does make its way into the fallopian tube and burrows into the egg, it fertilizes the egg. The egg changes so that no other sperm can get in. At the instant of fertilization, your baby’s genes and sex are set.
How can you tell if a chromosome is male or female?
The X and Y chromosomes, also known as the sex chromosomes, determine the biological sex of an individual: females inherit an X chromosome from the father for a XX genotype, while males inherit a Y chromosome from the father for a XY genotype (mothers only pass on X chromosomes).
How many genes are in a chromosome?
Chromosome 1 likely contains 2,000 to 2,100 genes that provide instructions for making proteins.
What are the normal chromosome numbers of a sperm egg and zygote?
Healthy humans have 46 chromosomes, 23 from the sperm and 23 from the egg.