WorksheetsY9 Genes and chromosomes
Total questions: 15
Worksheet time: 30mins
Genes and chromosomes are made up of a chemical called
DNA
RNA
NDA
AND
Which of the following has genes, chromosomes and DNA arranged in order of increasing size?
Cell nucleus, Chromosomes, Genes
Cell nucleus, Genes, Chromosomes
Genes, Chromosomes, Cell nucleus
Genes, Cell nucleus, Chromosomes
The picture shows.....
A cell nucleus
A strand of DNA
A chromosome
A gene
The picture shows......
Chromosomes
DNA
cell nuceus
genes
What is the missing word in the sentence?
" You began your life as a (a) . This was the cell formed when the nucleus of your fathers sperm cell fused with the nucleus of your mothers egg cell
Tick the box (or boxes) that contain statements that are TRUE.
Genes are made up of chromosomes
genes for a particular characteristic ( eg eye colour) have several different forms
you inherit most of your genes from your father
Cells in different parts of your body contain different chromosomes
Tick the box (or boxes) that contain features that are determined ONLY by your genes
hair colour
eye colour
size
left or right handedness
How many different genes does a human have?
23
46
hundreds
thousands
What is the missing word in the following sentence:
" Genes are sections of a long thread like molecule called DNA. Strands of these molecules are coiled up and contained inside structures called (a) "
What is the missing word in the following sentence: "Every gene is made up of a pair of (a) , one inherited from the father and one from the mother
How many chromosomes are found in the nucleus of human cells?
22
23
46
48
Here are four different human features:
eye colour weight skin colour left/right handedness
How many of these features are only decided by your genes?
1
2
3
4
Aliens on the planet Zog have long or short antena, depending on their genes
The allele "A" for long Antena is dominate
The allele "a" for short antena is recessive
An alien on has a gene containing an "A" allele and an "a allele. Which statement is true?
the alien with have short antena
the alien will have long antena
the alien will have antena which are of medium length
the alien will have one long antena and one short antena
Aliens on the planet Zog have long or short antena, depending on their genes
The allele "A" for long Antena is dominate
The allele "a" for short antena is recessive
Dad's antena gene is made up of two A alleles (AA)
Mom's antena gene contains and A allele and an a allele (Aa)
Which statement about their children is correct?
the children will have medium length antenna
the children may have long or short antena
all the children will have long antena
all the children will have short antena
This picture is taken from your course book. What are represented by the coloured bands in the picture?
DNA
genes
chromosomes
alleles
