WorksheetsGenetics and Reproduction
Total questions: 25
Worksheet time: 19mins
The trait that is represented by a capital letter.
Dominant Allele
Recessive Allele
Genotype
Phenotype
The trait that is represented by a lower-case letter.
Dominant Allele
Recessive Allele
Genotype
Phenotype
A diagram used to organize all of the possible outcomes of offspring from particular parents.
Genetics
Punnett Square
Genotype
Phenotype
The genetic makeup of an organism.
Dominant Allele
Recessive Allele
Genotype
Phenotype
An organism’s physical characteristics or appearance.
Dominant Allele
Recessive Allele
Genotype
Phenotype
The characteristic for having dimples (D) is dominant. The characteristic for NOT having dimples is recessive (d). A Punnett square showing a cross between a dimpled person and a non-dimpled person is shown.
What percentage of the offspring from this cross will most likely HAVE dimples?
25%
50%
75%
100%
Which ratio is representing the genotypes in this Punnett square?
4:0:0
2:2:0
0:2:2
1:2:1
Which ratio is representing the phenotypes in this Punnett square?
4:0
2:2
3:1
0:4
In guinea pigs, black fur (B) is dominant and white fur (b) is recessive. A Punnett square of a cross between a black-furred and white-furred guinea pig is shown. What can be determined from this Punnett square?
There is a 100% chance that the guinea pig will have live offspring.
There is a 100% chance that the guinea pig will have 4 offspring.
There is a 75% chance that the offspring (baby) will have white fur.
There is a 50% chance that the offspring (baby) will have black fur.
In some breeds of dogs, wire hair texture is dominant and smooth hair texture is recessive. Two parents with wire hair (dominant) produce an offspring with smooth hair (recessive). Which of the following would most likely be the genotypes of the parents if they are both wired hair, but produced an offspring with smooth hair?
HH x hh
HH x HH
Hh x Hh
hh x hh
In this cross of two plants pictured, what will be the genotype of the offspring?
50% of the offspring will have the same genotype as the parents.
100% of the offspring will all have the same genotype as the parents.
0% of the offspring will have the same genotype as the parents.
5% of the offspring will have the same genotype as the parents.
What would be the genotype of a homozygous recessive?
BB
Bb
bb
What would be the genotype of a heterozygous?
BB
Bb
bb
What does the TT represent in this Punnett square?
A genotype consisting of two dominant alleles.
A heterozygous trait.
A single trait.
A genotype consisting of two recessive alleles.
Which ratio is representing the genotypes in this Punnett square?
4:0:0
2:2:0
0:2:2
1:2:1
Which ratio is representing the phenotypes in this Punnett square?
4:0
2:2
3:1
0:4
What happens in anaphase II of meiosis?
Chromosomes are duplicated.
Chromosomes line up in the middle.
Sister chromatids separate.
A nuclear membrane forms around each set of chromatids.
Why is meiosis important?
It produces sex cells.
It produces diploid cells.
It produces chromosomes.
It produces alleles.
Which number represents Telophase II?
4
6
7
8
Which number represents Metaphase I?
1
2
3
6
What is the end result of mitosis and meiosis?
Mitosis ends with 1 daughter cell and meiosis ends with 4 daughter cells.
Mitosis ends with 4 daughter cells and meiosis ends with 2 daughter cells.
Mitosis ends with 2 daughter cells and meiosis ends with 4 daughter cells.
Both Mitosis and Meiosis end with 2 daughter cells.
Female jellyfish release eggs from their mouths into the sea. If the eggs encounter jellyfish sperm, they can be fertilized and grow into new jellyfish. How do jellyfish reproduce?
Sexually
Asexually
through fragmentation
through budding
Which of the following organisms reproduces asexually?
Starfish
Turtle
Zebra
Human
Which example could only be classified as an outcome of sexual reproduction?
When all of the offspring are genetically identical.
When two of the offspring are produced from one parent.
When one parent combines its genetic information with another parent to produce an offspring.
When the cells in the offspring have the same chromosomes as cells in the parent.
What is a benefit of asexual reproduction?
Time and energy is not lost.
Offspring are genetically different so more variation occurs.
Offspring do not have as many chromosomes.
There is a greater amount of competition for food.
