Test
Year 9 - Genetics
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Preguntas del test (24)
1These two sisters are identical twins. The reason why they look alike is because they have
- Athe same alleles and a similar diet
- Bthe same alleles and a different diet
- Cdifferent alleles and a similar diet
- Ddifferent alleles and a different diet
2These two sisters are identical twins. The sisters found out that all their features were controlled by
- Adominant alleles only
- Brecessive alleles only
- Cdominant and recessive alleles
- Dneither dominant nor recessive alleles
3These two sisters are identical twins. The sisters have a brother with cystic fibrosis.
This meant he often had- Askin infections
- Blung infections
- Ceye infections
- Dthroat infections
4These two sisters are identical twins. The sisters have a brother with cystic fibrosis. Their brother decided that he would not have any children of his own because the probability of him passing on the allele for cystic fibrosis was
- A100%
- B75%
- C50%
- D25%
5Our body is made up of different cells.
Each cell contains structures that help to keep the cell alive.
Part X on the diagram shows a unit of inheritance.
A unit of inheritance is
- Aa gene
- Bdominant
- Crecessive
- Da gamete
6The cubs born to the lions will inherit
- Aall their genes from their mother
- Ball their genes from their father
- Can equal number of genes from each parent
- Dno genes from either parent
7Some organisms produce clones.
Clones are- Aidentical to both parents
- Bidentical to neither parent
- Cidentical to one parent
- Didentical to another species
8Where in the cell are chromosomes found?
- Acell membrane
- Bcytoplasm
- Cchloroplast
- Dnucleus
9Genes are made of
- Aalleles
- Bchromosomes
- CDNA
- Dgametes
10Normal cells divide to enable the growth and repair of tissue.
This involves mitosis to produce- A4 identical nuclei
- B2 identical nuclei
- C4 non-identical nuclei
- D2 non identical nuclei
11Which is not true?
- AGenes are made from DNA
- BGenes are made from chromosomes
- CGenes are found in the nucleus
- DGenes control cell activity
12Chromosomes are found in the part of the cell labelled Z.
What is Z?
- Acell membrane
- Bchlorophyll
- Ccytoplasm
- Dnucleus
13How many chromosomes are found in Z?
- Anone
- Bone
- Ctwo
- Dfour
14Police officers can gain information about criminals by collecting samples of blood from the crime scene. The information is analysed and compared to data they have on computer.
Where is DNA found in a blood sample?- Aplasma
- Bplatelets
- Cred blood cells
- Dwhite blood cells
15The diagram shows the inheritance of eye colour in a family. The allele for brown eyes is dominant (B) and the allele for blue eyes is recessive (b).
Which of the following statements is true?
- ALucy and Daniel both have blue eyes
- BLucy and Daniel have different coloured eyes
- CLucy and Daniel have the same coloured eyes
- DAll the males in the family have brown eyes
16The diagram below shows the inheritance of eye colour in a family. The allele for brown eyes is dominant (B) and the allele for blue eyes is recessive (b).
What is the sex and eye colour of baby M?- Amale with brown eyes
- Bmale with blue eyes
- Cfemale with brown eyes
- Dfemale with blue eyes
17The diagram below shows the inheritance of eye colour in a family. The allele for brown eyes is dominant (B) and the allele for blue eyes is recessive (b).
In the family shown, Rachel has an identical twin. Rachel has brown eyes.
Who is Rachel’s identical twin?- ASarah
- BGary
- CLucy
- DDavid
18Complete each box by writing in A, T, C or G to show the bases of part of the double strand of DNA.
- AA
- BC
- CG
- DT
- EA
- FC
- GG
- HT
- IA
- JC
- KG
- LT
- MA
- NC
- OG
- PT
- QA
- RC
- SG
- TT
- UA
- VC
- WG
- XT
19The allele for brown eyes (B) is dominant to the allele for blue eyes (b).
People with brown eyes have at least one dominant allele.
Complete the table.
- ABB
- BbB
- Cbb
- DBB
- EbB
- Fbb
20Cystic fibrosis is an inherited disease where certain cells produce abnormal mucus.
The allele for the disease is recessive.
The diagram shows how cystic fibrosis was inherited in one family.
How many of the children of A and B were homozygous dominant?
- A1
- B2
- C3
- D4
21Cystic fibrosis is an inherited disease where certain cells produce abnormal mucus.
The allele for the disease is recessive.
The diagram shows how cystic fibrosis was inherited in one family.
What is the phenotype of D?- AMale without cystic fibrosis
- BMale with cystic fibrosis
- CFemale without cystic fibrosis
- DFemale with cystic fibrosis
22Cystic fibrosis is an inherited disease where certain cells produce abnormal mucus.
The allele for the disease is recessive.
The diagram shows how cystic fibrosis was inherited in one family.
What is the probability of F and G having a child with cystic fibrosis?- A1/2
- B1/3
- C1/4
- D1/5
23In tomato seedlings, the first leaves can be either green (filled in) or yellow (not filled in).
The colour of the leaves is controlled by one gene with two alleles. One allele is dominant and one allele is recessive. Two tomato plants were crossed. The seeds from this cross were grown. The results were obtained in the picture.
Calculate the ratio of the two phenotypes.
- A1/2
- B1/3
- C1/4
- D1/5
24Plant breeders wanted to produce a better variety of tomato by selective breeding. Two plants, of the varieties Tangella and Piranto, were crossed. Information about each variety of tomato is shown in the table.
Which features of Piranto would the plant breeders wish to see in the new breed of tomato?
- AYield
- BFlavour
- CResistance
Información
- Descripción
- IGCSE Biology Test sobre Year 9 - Genetics, creado por Archana RELAN el 23/02/2020.
- Autor
- Archana RELAN
- Idioma
- English
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