This week

This week in Science we learned about genetics. We discussed Punnett Squares and learned about how alleles can carry from generation to generation. Also we learned new words like:

Genotype: Genetic code
Phenotype: Phisical qualities
Homozyous: Same alleles
Heterozyous: Different alleles
Recessive: Weak allele
Dominant: Strong allele (overpowers a recessive allele)

This is how it works:
The gene is passed down it combines with the gene of the other parent. So, if a female is lefty she is heterozygous recessive (rr). If the male is righty he is homozygous dominant (RR) or heterozyous dominant (Rr).

When they have sex they will have two righty and two lefty.

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This week in science we talked about MEIOSIS

Meitosis is sexual reproduction. It is when sex cells replicate. 1st the cell makes homologes pairs and the pairs split. Then the cell splits and makes 2 new cells. The 2nd stage is when the chromasomes split so you end up with 4 new cells with 50% d.n.a.