Genes and Traits
Dominant or Recessive?
Genetics Vocabulary
Real-World Genetics
Punnett Squares
100
What is the molecule that carries the genetic instructions for all living organisms and determines inherited traits?
DNA
100
The allele that always shows up when present is called ______
Dominant
100
The different forms of a gene are called ______
Alleles
100
If your family has a history of color blindness, scientists can trace that trait through this type of chart.
Pedigree Chart
100
Draw me a Punnett square with 2 heterozygous parents
200
What is genetics?
The study of genes
The study of DNA
The study of genes passed down from family members
200
The allele that is hidden when a dominant allele is present is ______
Recessive
200
The stronger allele that masks another is called the ______ allele.
Dominant
200
In sexual reproduction, offspring inherit DNA from how many parents?
Two
200
Draw me a Punnett Square with 2 homozygous parents
300
The physical appearance of a trait (like eye color) is called the ______
Phenotype
300
If brown fur (B) is dominant and white fur (b) is recessive, what color fur would Bb have?
Brown fur
300
The weaker allele that is hidden when a dominant one is present is called ______.
Recessive
300
If 2 organisms have the exact same genes, why would that be harmful to their species?
They are unable to adapt, so it will be easier for them to catch a disease or infection.
300
Draw me a Punnett square for a cross between a red flower (RR) and a white flower (WW). What percent will be red? What percent will be white? And what percent will be pink?
100% Pink
400
If both alleles are the same (TT or tt), the genotype is ______.
Homozygous
400
A white mouse (bb) is bred with a brown mouse (BB). What will all the offspring look like?
All offspring will be brown
400
A chart used to show possible genetic combinations from a cross is called a ______
Punnett Square
400
Why might two siblings look different even though they have the same parents?
They inherit different gene combinations from their parents
400
Draw me a Punnett Square for a cross between a black cat (BB) and a grey cat (BW). What percent would be black? What percent would be grey? What percent would be white?
50% Black
50% Grey
0% white
500
If both parents have brown eyes but have a child with blue eyes, what does that tell you about the parents’ genotypes?
Both parents genes are heterozygous (Bb)
500
If two heterozygous (Bb) animals are crossed, what percent of their offspring are expected to show the recessive trait?
25% of 1/4
500
Scientists use this chart with circles and squares to track which family members have or carry a genetic trait.
Pedigree Chart
500
In which type of reproduction would offspring be genetically identical to the parent?
Asexual Reproduction
500
On a piece of paper, draw me a Punnett Square that results in 25% of the squares receiving the recessive gene.
