Our genes are inherited from our parents, and the different combinations of these genes make us unique. Genetic inheritance controls the characteristics of all living things.
During fertilisation sex is determined by which of these cells?
Red blood cell
The sex determining chromosomes in humans are which numbered pair?
What are human gametes?
Sperm and pollen
Ova and spores
Sperm and ova
What are the different versions of a gene called?
What term could be used to describe the pair of alleles HH?
What is the best definition of a dominant allele?
An allele that is the strongest
An allele that will be expressed in the heterozygote
The weakest allele
Which of these is a phenotype?
If both of the parental genotypes are heterozygous, what percentage of the offspring will be homozygous recessive?
If both the parental genotypes are heterozygous, what percentage of the offspring will show the dominant phenotype?
If the parental genotypes are heterozygous, what ratio will be shown in the genotypes of the offspring?