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Audrey Sovel-Step 16

QuestionAnswer
What is the definition of sexual reproduction? Sexual reproduction is when two organisms combine genetic information to create a baby.
What is the definition of the word egg? An egg is a haploid cell created in females for sexual reproduction. It is produced in the ovary.
How would you define the word sperm? A sperm is a haploid cell created in males for sexual reproduction. It is produced in the testis.
Can you define fertilization? Fertilization is the process where an egg and a sperm come together.
What are diploid cells? Diploid cells are cells that have pairs of chromosomes.
What is a zygote? The new cell that is created by fertilization is a zygote.
What is the definition of meiosis? The process in which one diploid cell turns into four haploid cell is called meiosis.
What are haploid cells? Haploid cells, also know as sex cells, have half the amount of chromosomes body cells have in that organism. In other words, a haploid cell has one chromosome from every pair.
How would you define homologous chromosomes? Pairs of chromosomes that have genes for the same traits arranged in the same way are homologous chromosomes.
When does Down Syndrome occur? Down Syndrome occurs when a person has an extra copy of chromosome twenty one.
When does interphase occur? Interphase occurs before meiosis.
What occurs during interphase? DNA (chromatin) replicates itself.
What is uncoiled, stringy DNA called? It is called chromatin.
How many pieces of chromatin does a human diploid cell have? Human diploid cells have 46 pieces of chromatin.
Where does your DNA come from? Half of your DNA is from your mom, and the other half is from your dad.
What does DNA have that determines traits in organisms? DNA has genes that determine traits in organisms.
What are different forms of genes called? Different forms of genes are called alleles.
What alleles are there in Snurfles? There is an allele for green fur, and there is an allele for yellow fur. G is for yellow fur, and g is for green fur.
What are gametes? Gametes are sperm and egg cells.
How many divisions are in meiosis? There are two division in meiosis.
What are the phases of meiosis one? Meiosis one includes prophase one, metaphase one, anaphase one, and telophase one.
What are the phases of meiosis two? Meiosis two includes prophase two, metaphase two, anaphase two, and telophase two.
What happens in prophase one? In prophase one, the nucleus disintegrates, and chromoses condense and become visible. Homologous chromosomes pair up to make a tetrad.
What is a sister chromatid? Each half of a replicated chromosome is a sister chromatid.
What is a quality of sister chromatids of a chromosome? They are identical.
What happens in anaphase two? In anaphase two, sister chromatids split up.
Why must meiosis two take place? Meiosis two must take place because the cells from meiosis one have too much DNA.
What occurs in metaphase one? The tetrad line up in the middle of the cell during metaphase one.
What is the middle of the cell called? The middle of the cell is the equator.
When do homologous chromosomes split up and move to opposite ends of the cell? This occurs in anaphase one.
What happens during telophase one? Two independent cells begin to form in telophase one.
What is cytokinesis? The division of the cytoplasm to make two new cells is cytokinesis.
What do you have at the beginning of meiosis one? At the start, you have one diploid cell.
Why are the two new cells that form from meiosis one haploid cells? They are haploid cells because they have half the chromosome as the original cell.
What occurs during prophase two? The nucleus disappears in prophase two.
What occurs during metaphase two? The chromosomes line up single file down the middle of the cell.
What occurs during telophase two? Four haploid daughter cells are being formed in telophase two. The chromosome uncoil to form chromatin. Each newly formed cell develops a nucleus around its chromosomes.
Created by: SCFCS
 

 



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