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BIO 120-Meiosis

BC- Meiosis

QuestionAnswer
What is the purpose of meiosis (producing gametes)? Sexual reproduction
How many chromosomes in a human gamete (egg or sperm)? 23
Another name for reproductive cells (eggs & sperm): Gametes
What are the female sex chromosomes? XX
Explain how crossover occurs? (Between what portions of chromosomes) Non-sister chromatids of homologous chromosomes
Compared to mitosis, how many stages of meiosis are there? Eight (4 -PMAT I and 4 PMAT II)
What is the purpose of crossover during meiosis? Genetic Mixing (Recombination)
Total number of chromosomes in a human diploid cell. 46
What are the male sex chromosomes? XY
The nuclear division mechanism whereby the daugher cells are haploid gametes. Meiosis
Alternative forms of the same genes are called _______. Alleles
The type of cells which will undergo meiosis. Germ Cells
This is the study of heredity and inherited variation: Genetics
All the cells in the body that are not eggs or sperm are termed ______ cells. Somatic
The position of a gene on a chromosome is its ______. Locus
Genetically identical individuals or cells are termed: Clone
This is an organized display of paired chromosomes in a duplicated state. Karyotype
Each pair of identical chromosomes are termed ______ chromosomes. Homologous
Chromosomes other than the X and Y are termed: Autosomes
In humans gametes, how many chromosomes are there? 23
A fertilized egg is termed a _____. zygote
The ______ ______ is the zipper like structure that holds the homologs together. Synaptonemal complex
During ______ DNA breaks are repaired and non-sister chromatids are rejoined. Synapsis
Changes in the base sequence of a DNA molecule is known as a ______. Mutation
Crossover occurs between _______ chromatids of _______ chromosomes. Non-sister; homologous
How many chromosomes in a haploid human cell? 23
Created by: callen-pbsc
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