WorksheetsInheritance
Total questions: 15
Worksheet time: 8mins
What is the definition of the phenotype?
The physical traits of an organism
The genetic makeup of an organism
The letters eg, Aa
How the genotype is expressed.
Which answer includes the dominant homozygous genotype?
AA
Aa
aa
Which answer contains the heterozygous genotype?
AA
aa
Aa
What is the definition of an allele?
An allele is a variety of a gene.
An allele is the genetic makeup of an organism
An allele is another word for a gene.
A gene is...
A heritable factor that controls a specific characteristic
An allele
A length of DNA which occupies a specific position on the chromosome
What does the law of segregation state?
Separate genes are passed independently from each other, from parent to offspring.
Every individual possesses two alleles for any particular trait and which allele a parent gives its offspring is completely random.
Just because an allele is dominant, doesn't mean it is inherited more often.
A recessive allele is expressed less than a dominant allele.
What does the law of independent assortment state?
Punnet squares are able to predict the phenotypes and genotypes of offspring.
Offspring inherit one allele from each parent.
Separate genes are passed independently from each other from parent to offspring.
What is the law of dominance?
One of the pairs of inherited traits will be dominant and the others recessive unless both the factors are recessive.
There will always be a dominant allele.
One of the pairs of inherited traits will be dominant and the others recessive.
What is the definition of a genotype?
The genetic makeup of an organism
The physical traits of an organism.
When one allele is dominant and one allele is recessive.
When both alleles are dominant.
What is the definition of heterozygous?
When both alleles are dominant
When one allele is dominant and one is recessive.
When both alleles are recessive.
When one gene is dominant and one is recessive.
In dogs, the allele for black fur (B) is dominant over the allele for white fur (b). A breeder breeds a heterozygous dog with a recessive homozygous dog. If the female dog has a litter of 12 puppies, predict how many will have black fur.
12
3
6
4
In cats, the allele for stripes (S) is dominant over the allele for no stripes (s). Two heterozygous cats are bred. If the female cat has a litter of 8, predict how many kittens will have no stripes.
2
6
4
8
In guinea pigs, the allele for short hair (H) is dominant and the allele for long hair (h) is recessive. When a dominant homozygous male and a heterozygous female are bred together, what is the predicted phenotypic ratio for the offspring?
1:1 short hair to long hair
All have short hair
1:3 short hair to long hair
1:3 long hair to short hair
