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Traits of Offsprings

Offsprings inherit new combimations of genes which leads to variations in their traits
Gene codes for traits

Are linked together into a long strand called chromosome
Some traits are controlled by a single gene

but many traits are controlled by several genes working together
Genes are a part of what?

DNA
What is a Chromosome?

DNA wrap up w/ proteins coiled together
Homozygous gene pairs are called what

alleles
Alleles are what?

Homozygous that are identical gene pairs like AA or aa
Heterozygous

gene pairs that are not identical.. Aa
Dominant genes are expressed with what

capital letter
Recessive genes are not expressed when

the pair is dominant little....a
meiosis

Is a nuclear division that reduces the cromosome number by half 2(n) equals n
Two stages of meiosis

Crossing over & ramdom aligment, allows for most of the varation in meiosis
Crossing over
- allows swapping of genes between maternal & paternal like homologous chromosomes.
- breaks up the old codes and makes new ones for offsprings
Ramdom allignment
- allows different combos of maternal & paternal chromosomes .
- different combos of traits are passed to offsprings
Gamete Formation

Gametes sex cells(n) include :sperm,eggs, isogametes ect..
Fertillization between two (n) gametes

Restores the parental chromosome number (2n) for a new genetic individual
Incomplete dominance
- Neither gene in the pair are dominate.
- causes a intermediate physical appearance
Treatment of genetic disorders
- 1) Diet modification 2) Surgical reconstruction 3) Genetic counselling 4) Pre-natal diagnosis
- 5) Replacement Therapy 6) Biotechnology
Diet modification

avoidance of allergy foods
Surgical reconstruction

Surgery is used to correct physical apperance
Genetic counseling

Determine potential genetic trait in furture offspring
Pre-natal diagnosis

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Anonymous

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Bio

Description

Genetics

Updated

2012-02-14T05:32:02Z

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