| Question Answer | Each half of a replicated chromosome is called a sister chromatid | A fertilized egg is called a Zygote | DNA that determines the traits of an organism? Genes | What are the 2 alleles for fur color in Snurfles and which letters represent those alleles? Yellow and Green |
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What are made during meiosis?
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces
four gamete cells
. … The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell.
What does the nucleus do during prophase 2?
During prophase II,
chromosomes condense and the nuclear envelope breaks down, if needed
. The centrosomes move apart, the spindle forms between them, and the spindle microtubules begin to capture chromosomes.
What is uncoiled stringy DNA called?
What is uncoiled, stringy DNA called? It is called
chromatin
.
What are the 2 alleles for fur Colour in the Snurfles and which letters represent these alleles?
The two alleles for fur color in snurfles are
Yellow and Green
. These alleles are represented by the letters G and g.
Are alleles DNA?
Except in some viruses, genes are made up of DNA, a complex molecule that codes genetic information for the transmission of inherited traits. Alleles are also genetic sequences, and they too code for the transmission of traits. … The short answer is that
an allele is a variant form of a gene
.
What alleles will show in your phenotype even if it has one copy?
Dominant alleles
show their effect even if the individual only has one copy of the allele (also known as being heterozygous
?
). For example, the allele for brown eyes is dominant, therefore you only need one copy of the ‘brown eye' allele to have brown eyes (although, with two copies you will still have brown eyes).
Why is meiosis 2 necessary?
Cell Cycle and Cell Division. Why Meiosis II is necessary when cell is divided in Meiosis I ?
The two chromosomes are not seperated during Meiosis I
. The cells are diploid, therefore in order to distribute the chromosomes eqully among the daughter cells so that they contain half the chromosome , Meiosis II is necessary …
How does meiosis occur in humans?
In humans, meiosis is
the process by which sperm cells and egg cells are produced
. In the male, meiosis takes place after puberty. Diploid cells within the testes undergo meiosis to produce haploid sperm cells with 23 chromosomes. … Fertilization restores the diploid number of chromosomes.
What is the difference between mitosis and meiosis?
Cells divide and reproduce in two ways, mitosis and meiosis.
Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells
. Below we highlight the keys differences and similarities between the two types of cell division.
What 4 things happen during prophase?
- chromosomes condense and become visible.
- spindle fibers emerge from the centrosomes.
- nuclear envelope breaks down.
- nucleolus disappears.
What happens to nucleolus during mitosis?
At the beginning of mitosis, the chromosomes condense,
the nucleolus disappears
, and the nuclear envelope breaks down, resulting in the release of most of the contents of the nucleus into the cytoplasm. …
Why does prophase 2 happen?
During prophase II,
chromosomes condense and the nuclear envelope breaks down, if needed
. The centrosomes move apart, the spindle forms between them, and the spindle microtubules begin to capture chromosomes.
Is chromatin made of DNA?
Chromatin is
a complex of DNA and proteins
that forms chromosomes within the nucleus of eukaryotic cells. … Under the microscope in its extended form, chromatin looks like beads on a string. The beads are called nucleosomes. Each nucleosome is composed of DNA wrapped around eight proteins called histones.
Is it true that DNA replicates during interphase?
During interphase,
the cell grows and the nuclear DNA is duplicated
. Interphase is followed by the mitotic phase. During the mitotic phase, the duplicated chromosomes are segregated and distributed into daughter nuclei. The cytoplasm is usually divided as well, resulting in two daughter cells.
Is RNA part of a chromosome?
Among eukaryotes, the chromosomes are contained in a membrane-bound cell nucleus. The chromosomes of a eukaryotic cell consist primarily of DNA attached to a protein core. They also contain
RNA
. … DNA wraps around proteins called histones to form units known as nucleosomes.
