Genetics

Genetics

is the scientific study of genes and heredity

Heredity

refers to the passing of traits

Genes

are basic units of heredity

Deocyribonucleic Acid (DNA)

Genes are made of lengths of complex molecule called

DNA

carries the genetic code

Genotype

a person's unique set of genes

Phenotype

refers to the traits and qualities of an individual that come from the genotype

Variation

is the difference of the characteristics such as eye colour

Gregor Mendel

1866

Johann Friedrich Miescher

1869

Hugo de Vries

Carl Erich Correns

Harriet B. Creighton & Barbara McClintock

American Scientists

46

Chromosomes comes in pair and humanshave - chromosomes

23 pairs

How many pairs of chromosomes do humans have?

sex cells

chromosomes that form the 23rd pair are called

2 X chromosomes

female chromosomes

one X and Y chromosome

Male chromosomes

Chromosome 1

largest chromosome

Chromosomes

are made of DNA

Genes

are special units of chromosomal DNA

Chromosome

looks like a thread ans is coiled material

Genes

are special units of chromosomal DNA

Chromosome

looks like a thread and is coiled material

Centromere or primary constriction or kinetochore

is the primary constriction at the center to B which the chromatids or spindle fibers are attached.

Chromatid

during cell division

Chromatin

is a complex of DNA and proteins that forms

Telomere

is the terminal region of each side of the

Chromonema

is a threadlike coiled filamentous structure along

Matrix

Pellicle is the membrane

Sutton and Bover

suggested the role of chromosomes in heredity in 1902.