WorksheetsGenetics and Evolutionary Biology Quiz Buster 1
Total questions: 20
Worksheet time: 40mins
Which diagram represents anaphase I of meiosis?
I
II
IV
V
Which diagram represents prophase I of meiosis?
I
III
IV
VI
The S phase of the cell cycle is characterised by:
Alignment of chromosomes at the mitotic plate
DNA synthesis
Separation of homologous chromosomes
Cytokinesis
In a diploid cell with 10 chromosome pairs (2n = 20), how many sister chromatids will be found in a nucleus at prophase of mitosis?
5
10
20
40
Round seeds (R) is dominant to wrinkled seeds (r), and yellow seeds (Y) is dominant to green seeds (y). A true-breeding (homozygous) plant with round and yellow seeds is crossed to a true-breeding (homozygous) plant with wrinkled and green seeds. What is the genotype of the F1 progeny?
RRYY
100% round and 100% yellow
rryy
RrYy
Mendel’s Principle of Segregation refers to:
The segregation of alleles of different genes in an independent manner
The concealment of an allele by the presence of another
The separation of alleles of one gene from each other during meiosis
The failure of chromatids to separate during meiosis
A red-haired rooster (RR) who is homozygous for the dominant allele is crossed with a red-haired rooster who is heterozygous (Rr). Using a Punnett square, determine the genotypic ratio of the F1 generation.
4 red-haired: 0 yellow-haired
2 RR: 2 rr
4 Rr
2 RR: 2 Rr
Red-green colour blindness shows an X-linked recessive pattern of inheritance. A woman whose father was red-green colour blind marries a man who has the condition. What proportion of their sons would have the disease?
100%
75%
50%
25%
Based on the pedigree chart shown below determine the mode of inheritance
X-linked dominant
X-linked recessive
Autosomal dominant
Y-linked
Autosomal recessive
According to the pedigree below, Individual 3 from Generation II is most likely to have what genotype?
RR
XRXr
XrXr
Rr
rr
Mitosis results in _________ cells; Meiosis II results in ________ cells.
2 haploid; 2 diploid
2 diploid; 4 haploid
1 diploid; 2 haploid
4 diploid; 2 haploid
Which term describes the absence of one chromosome in an otherwise diploid individual?
Aneuploidy
Trisomy
Hypoploid
Hyperploid
Monosomy
Which is TRUE about the SRY region?
It is located on the X chromosome in XY males.
It contains testosterone.
It is located on an autosomal chromosome.
It is located on the Y chromosome and initiates the developmental pathway toward the male phenotype.
Which of the following is FALSE about mosaic expression?
In a heterozygous female, each cell expresses either a normal or abnormal allele
It occurs in females who are homozygous for an X-linked trait
It leads to intermediate phenotypes
The inactivated X chromosome forms a Barr body
When neither allele is dominant, this is referred to as:
Incomplete dominance
Dominance
Recessive
Co-dominance
The term that describes hereditary factors responsible for traits is:
Genes
Loci
Genotypes
Phenotypes
Alleles
An affected mother and unaffected father have 4 children: 2 females and 2 males. Out of the 4 children, 1 male and 1 female are affected. What is the pattern of inheritance?
X-linked dominant
X-linked recessive
Autosomal dominant
Y-linked
Autosomal recessive
Which of the following correctly describes the flow of heritable information according to the central dogma?
RNA > Protein > DNA
Protein > DNA > RNA
RNA > DNA > Protein
DNA > RNA > Protein
Which of the following is TRUE about the XX-XY sex determination system in humans?
Female offspring are typically XO and the single X chromosome is inherited from the mother.
Male offspring have one X chromosome and it is inherited from their mother.
Female offspring have one X chromosome and one Y chromosome.
Male offspring have one X chromosome and it is inherited from their father.
If non-disjunction of Chromosomes 18 occurs at the first meiotic division followed by normal disjunction at the second meiotic division, what will be the resultant gametes be?
Four gametes: two containing an extra chromosome 18, and two with no chromosome 18
Four gametes: two containing an extra chromosome 18, and two containing one chromosome 18
Two gametes: both containing one chromosome 18
Four gametes: two containing one chromosome 18, one containing an extra chromosome 18, and one with no chromosome 18
