WorksheetsGenetics and Heredity Review
Total questions: 15
Worksheet time: 12mins
What is a genotype?
genetic makeup or genes and alleles
physical makeup or color
What is a phenotype?
The visible traits or characteristics you can see in an individual
The genetic makeup or gens found in an individual - the genetic code.
What are example of trait(s)?
eye color, musical talent
skin color, height
asthma, nose shape
All are examples of traits
Most traits are influenced by both our genotype and our environment.
true
false
When a living thing reproduces it passes its DNA on to its children, kids, young or offspring through the chromosomes.
true
false
The instructions for building a living thing are found in
The Earth
DNA and Chromosomes
Ground
Humans have a total of 46 chromosomes. If half or 23 come from the mother and half or 23 come from the father. How many chromsomes does each human offspring have?
23 chromosomes
46 chromosomes
102 chromosomes
The DNA and chromosomes are found in the cells of a human's body.
true
false
Dominant alleles on genes cause the dominant trait that the allele represents to be expressed as the trait. When the dominant allele is there the dominant trait is seen!
true
false
There must be two copies of the exact trait or alleles on the gene for a recessive trait to be present.
true
false
When a dominant and recessive allelle are present on the same gene the recessive trait is seen.
true
false
Probability in genetics can be defined as the chance that children will be born with certain traits
True
False
A genotype is also known as the genetic code for a given trait. Examples: Bb Heterozygous, BB Homozygous Dominant, and bb Homozygous Recessive
True
False
What is the best explanation for phenotype.
Hidden traits that cannot be seen in an organism.
Traits that are seen in an organism.
Neither answer is correct.
Why do human sex cells have 23 chromosomes instead of 46 chromosomes?
They don't because they have 46 chromosomes
Because the male and female sex cells combine to create 23 chromosomes
Because the male and female sex cells combine to create 46 chromosomes
