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WorksheetsGenetics: The Science of Heredity
Total questions: 12
Worksheet time: 11mins
The scientific study of heredity is called genetics.
True
False
An organism's physical appearance is its genotype.
True
False
In codominance, neither of the alleles is dominant or recessive.
True
False
Which of the following is the first step in the formation of sex cells in an organism that has 8 chromosomes?
The 2 chromatids of each chromosome separate.
Chromosome pairs line up next to each other in the center of the cell.
The DNA in the 8 chromosomes is copied.
The chromatids move apart, producing cells with 4 chromosomes each.
The different forms of a gene are called
Alleles
Chromosomes
Phenotypes
Genotypes
The likelihood that a particular event will occur is called
Chance
Punnett Square
Probability
Recessive
An organism with 2 identical alleles for a trait is
heterozygous
homozygous
dominant
recessive
If the body cells of an organism have 10 chromosomes, then the sex cells produced during meiosis would have ____ chromosomes.
5
10
15
20
Create a Punnett square and determine the probability for the following. Mom has Brown hair BB and Dad had Blonde hair bb. What is the probability that their baby has blonde hair?
25%
50%
0%
100%
Create a Punnett square and determine the probability for the following. Mom and Dad are both heterozygous for freckles. The dominant gene is F and the recessive gene is f. What is the probability of their baby not having freckles.
0%
25%
50%
100%
Create a Punnett square and determine the probability for the following. Mom is homozygous recessive and has white fur. Dad is homozygous dominant and has black fur. What is the probability that the babies will have black fur.
0%
25%
50%
100%
Mom has white fur and dad has red fur. Their alleles are codominant. What will their babies look like?
White
Red
Multicolor: Red and White (roan)
Multicolor: Brown
