Genetics By: Nash and Brandon

MEiosis:

EXamples of what it is:

Happens in animals, plants, and fungi

Daughter cells are genetically different

Prophase 1 takes much longer than it does in mitosis

Creates some germ cells in eggs and germ cells only

Results in having four daughter cells after the completion with genetically different aspects.

FACTS/CHARACTERISTICS:

It keeps the number of chromosomes from doubling by each generation

It provides the offspring with more chances at overall genetic diversity in themselves

Doesn’t occur in somatic cells like Mitosis does

Occurs only in plants, animals, and fungi

Daughter cells are genetically different

Prophase 1 takes much longer than it does in mitosis

Creates some germ cells in eggs and germ cells only

Results in having four daughter cells after the completion with genetically different aspects.

PUNNEtT'S Square

Punnett's square is a square to determine the genotypes and phenotypes of an offspring

Genotypes are the scientific way of describing the traits the offspring.

Phenotypes are the less scientific way of describe the offspring.

Chromsomes

If the 21st chromosome does not match the person is more than likely to have down syndrome or other. You have one pair of sex chromosomes and the rest are all autosomes.

Recombination and crossing over

DEFINITIONS TO KNOW

Recombination occurs during prophase 1 of meiosis. It is the exchange of chromosome segments which creates new a combination of genes that are not found in either of the parents.

Heredity- When traits are past from one families generation to another over time through the reproduction process.

Gene- One unit of heredity carried out through the DNA process.

Allele- Combines with another allele to create a gene, each parent gives an allele for each trait during sexual reproduction.

Dominant- An allele or gene that will always be expressed and will always show that trait.

Recessive- An allele or gene that will n to be shown because it does not have a dominant allele.

Homozygous- Two of the same dominant alleles in a gene.

Heterozygous- One dominant and one recessive allele in a gene.

Genotype- A gene for a particular trait.

Phenotype- The set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.

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