eurekami

Genes, alleles, genotypes and phenotypes

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.MS-LS3-2 · England: KS3 Biology: Inheritance, chromosomes, DNA and genes, GCSE Combined Science: Inheritance, variation and evolution

Name

Date

Score/ 16

1
Question 1
The allele G (green pods) is dominant over g. An organism has genotype GG. What is its phenotype?
- A. shows green pods
- B. does not show green pods
2
Question 2
Which word means: the alleles an organism has, written like Bb?
- A. heterozygous
- B. genotype
- C. allele
- D. dominant
3
Question 3
Genes and alleles: which statement is NOT true?
- A. A heterozygous organism shows the recessive phenotype.
- B. Most characteristics are controlled by several genes working together.
- C. Body cells carry two alleles of each gene, one from each parent.
- D. A recessive characteristic can skip a generation.
4
Question 4
An organism has the genotype tt. How is this genotype described?
- A. homozygous dominant
- B. heterozygous
- C. homozygous recessive
5
Question 5
Which word means: an allele that shows its effect with just one copy?
- A. phenotype
- B. genotype
- C. dominant
- D. heterozygous
6
Question 6
Genes and alleles: which statement is NOT true?
- A. The phenotype can be affected by the environment as well as the genotype.
- B. Dominant alleles are always the most common in a population.
- C. Most characteristics are controlled by several genes working together.
- D. Body cells carry two alleles of each gene, one from each parent.
7
Question 7
The allele F (free earlobes) is dominant over f. An organism has genotype FF. What is its phenotype?
- A. shows free earlobes
- B. does not show free earlobes
8
Question 8
Which word means: an allele that only shows its effect when two copies are present?
- A. homozygous
- B. phenotype
- C. genotype
- D. recessive
9
Question 9
Genes and alleles: which statement is NOT true?
- A. The phenotype can be affected by the environment as well as the genotype.
- B. Every characteristic is controlled by one single gene.
- C. A recessive characteristic can skip a generation.
- D. Body cells carry two alleles of each gene, one from each parent.
10
Question 10
An organism has the genotype BB. How is this genotype described?
- A. homozygous dominant
- B. heterozygous
- C. homozygous recessive
11
Question 11
Which word means: the characteristic you can see, such as brown fur?
- A. homozygous
- B. recessive
- C. heterozygous
- D. phenotype
12
Question 12
Genes and alleles: which statement is NOT true?
- A. Every characteristic is controlled by one single gene.
- B. The phenotype can be affected by the environment as well as the genotype.
- C. A recessive characteristic can skip a generation.
- D. Most characteristics are controlled by several genes working together.
13
Question 13
The allele B (brown fur) is dominant over b. An organism has genotype Bb. What is its phenotype?
- A. shows brown fur
- B. does not show brown fur
14
Question 14
Which word means: the characteristic you can see, such as brown fur?
- A. genotype
- B. dominant
- C. phenotype
- D. allele
15
Question 15
Genes and alleles: which statement is NOT true?
- A. A heterozygous organism shows the recessive phenotype.
- B. Most characteristics are controlled by several genes working together.
- C. A recessive characteristic can skip a generation.
- D. The phenotype can be affected by the environment as well as the genotype.
16
Question 16
The allele F (free earlobes) is dominant over f. An organism has genotype FF. What is its phenotype?
- A. shows free earlobes
- B. does not show free earlobes

Write your answers right on the page. · Free from eurekami.com