Table of Contents
- 1 What is the possibility that two children of the same family would be genetically identical and not identical twins )? Explain how you arrived at your answer?
- 2 Can you have twins without family history?
- 3 Can I have twins if my husband is a twin?
- 4 How does recombination work if a male is heterozygous?
What is the possibility that two children of the same family would be genetically identical and not identical twins )? Explain how you arrived at your answer?
If the cells separate early on in the process they can develop as two independent but twinned zygotes that share 100\% of their DNA. Since DNA and the genes within it contain all the biological instructions for making us, this should result in two identical looking babies: identical twins.
Can sperm be identical?
Identical twins have the same genetic material, but as you can see, every egg they both make is different. Every sperm a man makes is different. Hence the chances of their babies being identical are pretty close to zero. The kids wouldn’t be anymore alike than any brother or sister.
How many genetically different sperm can the male produce?
But what about chromosome reassortment in humans? Humans have 23 pairs of chromosomes. That means that one person could produce 223 different gametes. In addition, when you calculate the possible combinations that emerge from the pairing of an egg and a sperm, the result is (223)2 possible combinations.
Can you have twins without family history?
It’s a common misconception that twins skip a generation in families. There is absolutely no evidence, other than circumstantial, that twins are more likely to occur every other generation.
What happens if two sperm get into one egg?
Fraternal twins are formed when two eggs meet two sperm in the womb. Each is fertilized independently, and each becomes an embryo. With identical twins, one egg is fertilized by one sperm, and the embryo splits at some later stage to become two.
How do I make Y sperm more active?
Here are 10 science-backed ways to boost sperm count and increase fertility in men.
- Take D-aspartic acid supplements.
- Exercise regularly.
- Get enough vitamin C.
- Relax and minimize stress.
- Get enough vitamin D.
- Try tribulus terrestris.
- Take fenugreek supplements.
- Get enough zinc.
Can I have twins if my husband is a twin?
If the twins are present on your husband’s/partner’s side, it won’t influence your chances of having twins. Remember, the gene for hyperovulation is only a factor for the mother. If your mother (or your grandmother or aunt) was or had fraternal twins, you might have the gene.
Is sperm from one man identical to another man?
Sperm from one man is not identical. Males carry an X and a Y chromosome, and you’ll find that about half of their gametes (sperm) will carry an X and half will carry a Y. If a male is heterozygous for any genes, then half his sperm will carry one allele and half the other. And then think about the number of different genes there are.
How many sex chromosomes does a human cell have?
Humans and most other mammals have two sex chromosomes, the X and the Y. Females have two X chromosomes in their cells, while males have both X and a Y chromosomes in their cells. Egg cells all contain an X chromosome, while sperm cells contain an X or Y chromosome. This arrangement means that it is the male that determines the sex
How does recombination work if a male is heterozygous?
If a male is heterozygous for any genes, then half his sperm will carry one allele and half the other. And then think about the number of different genes there are. Recombination shuffles combinations of alleles between homologous chromosomes, making it almost certain that none of his sperm will be identical.
What is the difference between sperm cells and egg cells?
Egg cells all contain an X chromosome, while sperm cells contain an X or Y chromosome. This arrangement means that it is the male that determines the sex of the offspring when fertilization occurs.