Genetics Flashcards
What is variation
Differences
What is continuous variation in chromosomes give an example
Continuous variation
- described differences which vary over a huge range of values like eight and hight are examples
What is discontinuous variation in chromosomes give an example
discontinuous variation
- described differences within a distinct opinion (you can have one or another ). blood groups, eye colour and tongue rolling are examples
What is a phenotype
An appearance of an organism
What helps predict the chances of what characteristic children well have from the genes of two parents
The punnet squares
If parent one has black hair ( BB ) and the other parent has red hair ( bb )
What are the chances that any of the children will have red hair
All children Born will have black hair and genotype Bb
If black hair is dominated to red hair is it
B = black hair
B = red hair
Or
R= black hair
R= red hair
Capital B
How many sets of chromosomes dose the male sex cell Contain
One set
What number of chromosomes dose the female sex cell contain
23
do chromosomes exist in pairs
Yes
How dose chromosomes Cary their code
In the DNA
Where are chromosomes stored in
The nucleus
What are chromosomes divided into
Sections
Give an example of a gene
Tells the body to have brown hair
What do chromosomes contain
Long chains of DNA
How much cells to human bodies contain
46 ( 23 pairs)
Give me the two types of genes
Dominant and recessive
What is homozygous
An organism which has inherited two genes which are the same is said to be homozygous
Whats another word for homozygous
True breeding
If the pea plant gene is
TT -> tall
Is it heterozygous ( bonus question what is it )
No
It’s homozygous
What is heterozygous
An organism which has inherited two different genes is said to be heterozygous
Excluding coat colour and ear lobe type give three DIFFRENT examples of an inherited characteristics in a) animals b) humans c) plant
A) eye colour b) finger print c) if produces fruit
