Fail to reach their full potential height
Additive Effect
I am the sex that contains two fully
homologous sex chromosomes
Environmental Factors
I am examples of human characteristics that
show polygenic inheritance
Superscripts
I am what happens to an individual if they
don’t consume an adequate diet during
childhood and adolescence regardless of
how many dominant alleles for height they
possess
Factor VIII
I am the sex-linked condition caused by a
recessive allele that does not allow a person
to have normal colour vision
I am the type of allele that is responsible for
the sex-linked conditions haemophilia, redgreen colour blindness and duchenne
muscular dystrophy
Three or More Genes
I am the number of genes that are thought
to control polygenic inherited characteristics
like skin colour, hand span, foot size, weight
and height
Discontinuous Variation
I am the other factor that can influence the
overall phenotype of an individual usually
showing continuous variation
I am the type of variation that varies
amongst the population from one extreme
to the other and does not fall into distinct
groups
Female
Weight and Height
Skin colour, hand span, foot size, weight
I am the type of inheritance where a
I am the smaller of the two types of sex
characteristic that is controlled by more than chromosome
one gene
Duchenne Muscular Dystrophy
Continuous Variation
I am the type of inheritance that can be used
to divide up the members of a species into
two or more distinct groups
His Y chromosome does not possess alleles
of any sex-linked genes and cannot offer
dominance to them
I am the name given to the letters used to
represent the alleles of sex-linked genes
Carrier
I am the sex of child that always end up with
red-green colour blindness if the mother has
the condition
I am two examples of variation that is
continuous and does not fall into distinct
groups
Male
I am the essential blood –clotting factor that
haemophiliacs fail to make. Instead they
make an inferior version of it
Recessive Allele
I am the condition that causes severe
disability from a young age, muscle wasting,
early death and is almost entirely restricted
to males
Polygenic Inheritance
Sex-Linked Genes
I am the name given to the effect of each
gene involved in polygenic inheritance
adding a contribution to the overall
phenotype
Y- Chromosome
I am the reason why the genes on the X
chromosome are always expressed in the
phenotype of the human male produced
whether the gene is dominant or recessive
Red-Green Colour Blindness
I am the name given to genes found on the X
chromosome
I am the name given to a female who is
heterozygous for red-green colour blindness
who is unaffected themselves but may pass
on the colourblindess allele to their offspring