Vocab
Genes
Punnett Square
Punnett Square 2
100
A change in a gene
Mutation
100
A gene that is hidden when a dominant trait is present
recessive
100
Is this Heterozygous? Yes or no
rr
No
100
Who is the man who first experimented to discover how traits are passed down?
Gregor Mendel
200
A chart that shows all the possible combinations of genetic results.
Punnett Square
200
The gene that will always be shown if it is present.
Dominant
200
Recessive
200
Having freckles is dominant to not having freckles in humans. Using the letter F, cross a homozygous male with freckles with a female who has no freckles. Will any of their offspring not have freckles?
NO
300
The passing of traits from parent to offspring.
Heredity
300
A characteristic that an organism can pass to its offspring.
Trait
300
B = pointy ears and b = floppy ears. Cross a heterozygous pointy eared dog with a floppy eared dog. Show your work in your punnett square. What percentage of offspring would have pointy ears?
50%
300
In fish, soft scales are dominant to hard scales. Using the letter S, create a punnett square crossing two heterozygous fish. Give percentages of offspring being homozygous dominant, homozygous recessive, and heterozygous.
25% homozygous dom
50% heterozygous
25% homozygous recessive
400
Fertilization is...
A process when an egg and sperm join together to form a new organism.
400
What is the difference between homozygous and heterozygous?
Homozygous will show the same letters (either AA or aa). Heterozygous will show different letters (Aa)
400
P = purple and p=pink. Complete a punnett square for a homozygous purple flower crossing with a heterozygous flower. What is the percentage that the offspring would be pink?
0%
400
In horses, the dominant color is brown and the recessive color is grey. Using the letter G, create a punnett square crossing a grey horse with a heterozygous horse. Give percentages of homozygous dominant, homozygous recessive, heterozygous.
50% heterozygous
50% homozygous recessive
500
Different forms of a gene
Allele
500
Give an example of a homozygous recessive allele pair:
any two of the same lowercase letters.
500
B = brown eyes and b = blue eyes. Cross a blue eyed male with a blue eyed female using a punnett square. What is the percentage that their offspring will have brown eyes? What is the percentage they will have blue eyes?
100% blue eyes
0% brown eyes
500
In cats, having a curly tail is dominant to having a straight tail. Using the letter T, cross a homozygous curly tailed cat with a straight tailed cat using a punnett square. What are the chances of the offspring having a curly tail?
100%