Key Terms
Punnett Squares
Complex Inheritance
Surprise!
100
The mating of two organisms.
A) Brood
B) Cell Division
C) Cross
D) Dihybrid
C) Cross
100
What percentage of offspring will show the dominant phenotype?
100%
100
In carnations, red and white are both dominant. The flower shown here has the genotype RW, and exhibits both dominant traits equally. This is an example of ____.
a) Codominance
b) Incomplete dominance
c) X-linked inheritance
d) Complete dominance
a) Codominance
100
In a family, the two parents have blood groups of A and B and the three children have blood groups of B, B and O. What are the genotypes of the parents?
A] I A I A and I B I B B] I A I B and I A I O
C] I A I O and I B I O D] I B I O and I B I A
C
[FROM 2024 PAST PAPER]
200
Alternate version of a gene.
A) Trait
B) Allele
C) Homozygote
D) Gamete
B) Allele
200
This cross shows a heterozygote being crossed with a _______ individual.
a) Homozygous recessive
b) Homozygous dominant
c) Heterozygous
a) Homozygous recessive
200
In mice, black fur (BB) and white fur (WW) are both dominant. A mouse with the genotype BW will have grey fur. This is an example of:
a) Codominance
b) Incomplete dominance
c) X-linked inheritance
d) Complete dominance
b) Incomplete dominance
200
Which statement describes a type of variation?
A]Continuous variation is usually caused by the environment only.
B Continuous variation results in a limited range of phenotypes with no intermediates.
C Discontinuous variation is usually caused by genes only.
D Discontinuous variation results in a range of phenotypes between two extremes.
C
[2024 PAST PR]
300
A segment of DNA that provides instructions for making protein.
A) Gene
B) Trait
C) Allele
D) Chromosome
A) Gene
300
Brown eyes is dominant to blue eyes. Cross a blue eyed person with a homozygous dominant individual. List ALL possible genotypes.
100% Bb
300
Sarah has a blood type of IA i and her husband has a blood type of IB i. Their child has blood type IA IB. This is an example of:
a) Codominance
b) Incomplete dominance
c) X-linked inheritance
d) Complete dominance
a) Codominance
300
Which statement about variation is correct?
A] ABO blood groups show continuous variation. B] Body mass shows discontinuous variation. C ] Seed colour in peas shows continuous variation. D] Seed shape in peas shows discontinuous variation.
D
[PP]
400
The physical expression of an organism's genes.
A) Karyotype
B) Genotype
C) Genome
D) Phenotype
D) Phenotype
400
What is the genotypic ratio of the offpsring?
1:2:1
400
Human skin color is determined by over 150 different genes. Skin color is an example of ___.
a) Polygenic Inheritance
b) Codominance
c) Mendelian Inheritance
d) Incomplete Dominance
a) Polygenic Inheritance
400
Which statement is true of both chromosomes and genes?
A Each codes for a specific protein.
B Each may be copied and passed on in mitosis.
C Each may be either dominant or recessive.
D Each may exist as two or more alleles.
B
500
A ____ mutation occurs when one nucleotide is SWAPPED with another nucleotide. Example: ATGC --> AAGC
a) deletion
b) frameshift
c) point
d) gene translocation
c) point
500
If Mom's genotype is AaBb, what would you write across the top of a Punnett square?
AB / Ab / aB / ab
500
The allele for color blindness is recessive and located on the X chromosome (Xb). What would be the genotype of a non-colorblind female who has a son with colorblindness?
XB Xb
500
In some animals, B is the allele for normal skin (without spots) and b is the allele for spotted skin. A pair of these animals has 37 offspring, 18 with spots and 19 without. What are the most likely genotypes of the parents?
A] BB × BB B] Bb × Bb
C ]Bb × bb D] bb × bb
C