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In the whitefish how many chromosomes are there in a single set?
There are 40 chromosomes in a sperm cell of a white fish because the original number of chromosomes in a body cell is 80. Since the sex cells ( sperm and egg) each must contribute a set of chromosomes to the offspring, the sperm and egg both must have 40 chromosomes so they when the sperm and egg join or combine in a process known as fertilization, the offspring will have 80 chromosomes.
Why must sperm and egg cells reduce chromosomes before fusing?
Reducing chromosomes before fusing, through meiosis, ensures that the resulting offspring will have the correct number of chromosomes. If there is no reduction, the resulting zygote would have double the number of chromosomes, leading to genetic abnormalities and potential developmental issues in the offspring.
Why are chromosome copied before mitosis?
After Mitosis, the result is 2 new, identical, daughter cells. In order for each to be identical, the chromosomes must be copied.
Why can female only pass only an x chromosome to offspring?
The female can only pass on ONE "X". an XX female offspring must get the second X from the father.
Gametes must be haploid because?
they need to combine during fertilization to restore the diploid number of chromosomes in the offspring. Having haploid gametes ensures that the resulting zygote has the correct number of chromosomes for normal development.
In the whitefish how many chromosomes are there in a single set?
There are 40 chromosomes in a sperm cell of a white fish because the original number of chromosomes in a body cell is 80. Since the sex cells ( sperm and egg) each must contribute a set of chromosomes to the offspring, the sperm and egg both must have 40 chromosomes so they when the sperm and egg join or combine in a process known as fertilization, the offspring will have 80 chromosomes.
Why must sperm and egg cells reduce chromosomes before fusing?
Reducing chromosomes before fusing, through meiosis, ensures that the resulting offspring will have the correct number of chromosomes. If there is no reduction, the resulting zygote would have double the number of chromosomes, leading to genetic abnormalities and potential developmental issues in the offspring.
Why is it necessary for sex cells to have fewer the number of chromosomes regular cells?
The sex cells must combine with each other to make a whole. Each gamete starts out with half of the regular cell so that it can combine to make a whole. If they start out like somatic cells, the result will be double the chromosomes for the offspring.
What are the parents if 75 of the offspring have a Dominant gene?
If 75 offspring have a Dominant gene, then the parents must have at least one Dominant gene each. This would make them either Dominant Homozygous (DD) or Heterozygous (Dd) for the Dominant trait.
In humans an individual inherits one copy of each homologous chromosome from each parent In turn one of each homologous pair goes to a gamete to be passed on Females inherit two X chromosomes and male?
Males inherit one X and one Y chromosome, while females inherit two X chromosomes. During gamete formation, one member of each chromosome pair is randomly selected to be passed on to the offspring, ensuring genetic diversity. This process allows for genetic recombination and variation in offspring.
Why it is chromosomes not individual genes that assort independently?
For two genes to assort independently, they must reside on different chromosomes or be located far from each other.
Do all species have the same number of chromosomes?
No, chromosomes vary from species to species. A species is distinguished by individuals that can mate and have young that are capable of producing offspring. The number of chromosomes two individuals have must be the same for this to be possible.
Why are chromosome copied before mitosis?
After Mitosis, the result is 2 new, identical, daughter cells. In order for each to be identical, the chromosomes must be copied.
Why must gametes be haploid?
Gametes must be haploid because when they combine during fertilization, they form a diploid zygote with the correct number of chromosomes. This ensures genetic diversity and prevents the doubling of chromosomes in each generation.
Why can female only pass only an x chromosome to offspring?
The female can only pass on ONE "X". an XX female offspring must get the second X from the father.
Gametes must be haploid because?
they need to combine during fertilization to restore the diploid number of chromosomes in the offspring. Having haploid gametes ensures that the resulting zygote has the correct number of chromosomes for normal development.
What must happen to the genetic material from each parent before sexual reproduction can occur?
The genetic material from each parent must undergo a process called meiosis to reduce its chromosome number by half. This ensures that when the egg and sperm combine during fertilization, the resulting embryo will have the correct number of chromosomes.
