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WorksheetsGenetics and inheritance
Total questions: 12
Worksheet time: 11mins
Using the base pair rule, Adenine goes with ___ and Guanine goes with ___
Cytosine, thymine
Adenine, guanine
Thymine, cytosine
Guanine, adenine
Sketch out what DNA is shaped like:
An allele is a:
Gene
Form or variation of a gene
A chromosome
None of these
A phenotype is:
The physical expression of a gene
The genetic makeup of the gene
Not visible
All of these
A phenotype is a physical expression, where the genotype is:
Is another term for chromosomes
Is visible for us to see
Also the physical expression
The genetic makeup or allele combinations
Explain the connection between genotype and phenotype:
When you inherit two alleles (one from each parent), the combination can either be homozygous OR heterozygous, which means:
Homozygous is either two big or two little alleles (the same)
Heterozygous is a combo of one big and one small
Homozygous = Hh
Heterozygous = hh
Heterozygous is a mix of two alleles, so something like Aa. What determines which of these alleles is going to actually show up in the phenotype?
The recessive little allele will show up
The dominant allele covers the recessive, so the dominant will show up
The dominant will show up only if there is two big A's
It will be a mix of dominant and recessive
Purple flower pedals are dominant over yellow flower pedals. Two yellow flowers are bred together. Their offspring will be:
Purple
Yellow
A mix
You can't tell from this information alone
Purple flower pedals are dominant over yellow flower pedals. One purple and one yellow flower are bred together. Their offspring will be:
Purple
Yellow
A mix
You can't tell from this information alone
Punnett squares show us the possibilities for the offspring from two parents. In this case, the GENOTYPIC ratio will be:
1:1:1:1
3:1
1:2:1
In this case, the PHENOTYPIC ratio would be:
1:1:1:1
3:1
1:2:1
0:4
