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Worksheetsinheritance 30
Total questions: 30
Worksheet time: 18mins
What are small sequences of DNA that code for traits
Nucleus
Chromosomes
Gene
Centromeres
What is the function of the X and Y chromosomes?
Eye colour
Hair colour
Height
Gender
What is the definition of Homozygous?
When one allele is dominant and one is recessive
When an individual has two sets of the same allele.
What is the definition of heterozygous?
when an individual has two sets of the same allele
A pair of genes where one is dominant and one is recessive.
Sperms can have
Only X chromosome
Only Y chromosome
Either X or Y chromosome
Either XX or XY chromosomes
Ova (eggs) can have
Only X chromosome
Only Y chromosome
Either X or Y chromosome
Only XX chromosomes
What is the percentage of a woman having a male child?
25%
50%
75%
100%
A brown eyed man of genotype Bb marries a blue eyed woman. What is the chance that their third child is brown eyed?
25%
50%
75%
100%
A couple has had 1 child, who is a boy. Which of the following statements is true?
Their second child will be a girl because the ratio of boy:girl is 1:1.
Their second child will be definitely be a girl because the chance of her being a girl is 50%.
Their second child has a 50% chance of being either a boy or a girl as gender of the first child has no effect on the subsequent children.
A rose species has color which is determined by alleles R and r. A genotype of RR will give rise to red coloration, while rr gives rise to white coloration. Which of the statements is false?
The alleles R and r are different forms of a gene.
A gene is made up of proteins.
A gene is a DNA sequence.
The heterozygous genotype will have a phenotype of red.
After THREE rounds of mitosis, how many new cells will have been created from one parent cell?
4
8
20
16
Each parent gamete cell is __________ and they bring genes with __________
haploid, alleles
diploid, alleles
Father is homozygous black hair and mother is recessive red hair. Estimate F1 genotypes and phenotypes. (B-black, b- not black, red)
BB,Bb,BB,bb
BB,BB,bb,bb
Bb,Bb,Bb,Bb
Bb,bb,bb,bb
__________ are sequences in ____________ that is packed in_____________.
Genes, chromosome,DNA
DNA, gene, chromosome
Genes, DNA, chromosome
Chromosomes, genes,DNA
In case of Albinism, Aa genotype male can not marry with….. female.
AA
Aa
aa
To prevent color blindness:
Mother should be homozygous, father healthy
Mother should be heterozygous, father healthy
Mother should be homozygous, father color blind
