"Real-Life Traits"
Mia has straight hair, but both her parents have curly hair. What kind of allele must straight hair be?
What is Recessive?
A scientist studies why some people can taste a bitter chemical and others cannot. What genetic vocabulary word describes this ability?
What is a Trait? (controlled by a gene)
If a trait is recessive, how many recessive alleles must an offspring inherit to show the trait?
What is two recessive alleles?
A baby bear gets its mother’s thick winter fur. What is the passing of traits from parent to offspring called?
What is Heredity?
A doctor tells a family that a certain disease runs in their DNA. What structure stores this information?
What is DNA?
A pumpkin plant produces orange pumpkins even though it carries one allele for orange and one for white. What is the plant’s phenotype?
What is Orange?
A baby inherits attached earlobes even though one parent has detached earlobes. What must be true about the attached-earlobe allele?
What is attached earlobes must be recessive?
A heterozygous parent (Tt) has a child with a homozygous recessive parent (tt). What is one possible genotype of their child?
What is Tt or tt?
A gardener wants red roses but gets pink ones instead. What does this mean about the alleles involved?
What is Pink is a mix of alleles—shows incomplete dominance?
A botanist finds a plant with a mutation in a single trait-controlling DNA segment. What is this segment called?
What is Gene?
A family has brown-eyed parents who have a blue-eyed child. What does this mean about the brown-eyed parents’ alleles?
What is they are heterozygous?
A farmer breeds two tall corn plants but gets one short plant. What does this reveal about the tall plants’ alleles?
What is they were heterozygous? (carried the recessive allele)
Two heterozygous parents (Rr × Rr) want to know the chance their child will show the recessive trait. What percentage might it be?
What is 25%?
A horse has long legs because it inherited two dominant alleles. What vocabulary term describes this genotype?
What is Homozygous dominant?
A student learns that chromosomes are found inside which part of the cell?
What is The nucleus?
A student wonders why she and her brother look different even though they share the same parents. What genetic factor explains why siblings are not identical?
What is different allele combinations / genetic variation
A vet examines a dog that has one dominant allele for black fur and one recessive allele for brown fur. What is the dog’s genotype?
What is Heterozygous (Bb)?
A Punnett square shows the combinations Bb, BB, bb, and Bb. What fraction of the offspring will show the recessive trait?
What is 1 out of 4 (25%)?
A bee colony shows that some bees have a rare wing pattern found in only one parent. What does this reveal about that parent’s alleles?
What is the parent carried the recessive or rare allele?
A scientist notices that two animals have similar DNA patterns. What does this suggest about their relationship?
What is they may share a common ancestor / be closely related?
Two sheep produce a lamb with black wool even though both parents have white wool. Explain how this can happen genetically.
What is both parents carried a recessive allele for black wool?
A genetic detective is trying to determine whether a certain plant species always produces yellow seeds when crossed. What tool should they use to predict the possible outcomes?
What is Punnett square?
A student learns that curly hair (C) is dominant over straight hair (c). If a straight-haired child is born, what must the child’s genotype be?
What is cc?
A scientist studies wolves and discovers that fur thickness changes depending on the wolves’ environment. What might this show about the relationship between genetics and environment?
What is traits can be influenced by the environment?
A researcher studying endangered animals examines chromosomes to find which traits help them survive. Why are chromosomes important in this research?
What is chromosomes store genes that determine survival traits?