- Why does meiosis produce cells with half chromosomes?
- Why do gametes only have half a set of DNA?
- How many times does DNA replicate in mitosis?
- What part of the cell cycle is the fastest?
- Where does half of your DNA come from?
- Why do red and white flower alleles can interact with one another?
- Why does crossing true breeding red and white snapdragons result in pink offspring?
- What phenotype should the female be?
Why does meiosis produce cells with half chromosomes?
Meiosis produces cells with half the chromosomes to maintain genetic integrity in the offspring.
Why do gametes only have half a set of DNA?
As gametes are produced, the number of chromosomes must be reduced by half. Why? The zygote must contain genetic information from the mother and from the father, so the gametes must contain half of the chromosomes found in normal body cells.
How many times does DNA replicate in mitosis?
Note: The DNA replication occurs only once in both meiosis and mitosis although the number of cell divisions is two in meiosis and one in mitosis which results in the production of different numbers of haploid cells in both the process.
What part of the cell cycle is the fastest?
For the characteristic cell cycle time of 20 hours in a HeLa cell, almost half is devoted to G1 (BNID 108483) and close to another half is S phase (BNID 108485) whereas G2 and M are much faster at about 2-3 hours and 1 hour, respectively (BNID 109225, 109226). The stage most variable in duration is G1.
Where does half of your DNA come from?
You inherit half of your DNA from each parent. The halves you receive are random combinations of their DNA, which in turn is made up of random combinations of their ancestors’ DNA.
Why do red and white flower alleles can interact with one another?
We can equivalently say that the white allele for flower color is recessive to the red flower-color allele. This means that if a pea plant has two red alleles, its flowers will be red. If it has to white alleles, its flowers will be white. And, if it has a red allele and a white allele, its flowers will be red.
Why does crossing true breeding red and white snapdragons result in pink offspring?
This pattern of inheritance is described as incomplete dominance, meaning that neither of the alleles is completely dominant over the other: both alleles can be seen at the same time. The allele for red flowers is incompletely dominant over the allele for white flowers. Red + white = pink.
What phenotype should the female be?
While genotype refers to DNA, phenotype refers to the expression of that DNA in the physical manifestation of the organism. In humans, the section of the genotype that represents female sex is XX, and XY for males.