WorksheetsGenetics Unit Part 2
Total questions: 28
Worksheet time: 26mins
What scientist is known for inventing Punnett Squares to predict probability of traits?
Francis Crick
Gregor Mendel
Rosalind Franklin
James Watson
Alleles are different forms of a single _________.
Genotype
Phenotype
Gene
Trait
Phenotype refers to an organisms what?
Physical appearance
Combination of alleles
Chromosomes
Genes
Mendel's law of Dominance says that ____________.
A dominant trait requires two dominant alleles
A recessive trait masks a dominant trait
Phenotypes are dominant when two recessive alleles are present
Only one dominant allele is required to result in a dominant phenotype
Which of the following is a homozygous dominant genotype?
Hh
Tt
rr
BB
Sex linked traits affect which biological sex more frequently?
Female
Both sexes equally
Male
Which genotype represents a female who is a carrier for hemophilia?
In mice, black fur (B) is dominant to white fur (b). According to the Punnett square shown, the offspring in box 4 would:
be white.
be heterozygous.
be gray.
be homozygous.
What did Gregor Mendel study?
Mold Spores
Pea Plants
Sun Flowers
Rats
What was the theory of genetics before Mendel did his experiments.
All traits were random
All traits skipped a generation
All traits were decided by God
All traits were a mixing of the the parents traits
What is the sex of the individual shown in the karyotype below?
Male
Female
Sex-linked traits are inherited on the sex chromosomes. An example of a sex-linked trait is colorblindness, a recessive trait inherited on the X chromosome. Which genotype shows a female with colorblindness?
XBXB
XBXb
XbXb
XBY
XbY
This is called Turners syndrome, can you notice the mutation in the chromosomes?
Both chromosomes 1 are bent
There are too many chromosomes
There are too many of chromosome 3
There is no Y chromosome
How many chromosomes are in this image?
1
2
3
4
The failure of one or more pairs of homologous chromosomes or sister chromatids to separate "normally" during meiosis is called _____________________.
nondisjunction
anaphase I
nondiploidy
karyotype
The karyotype diagram below represents a human female with the genetic disorder known as Turner syndrome. Chromosomal analysis of this karyotype reveals the mutation is a result of
a missing X chromosome
a missing Y chromosome
an extra 21 chromosome
missing chromosome #9
The karyotype diagram below represents a human male. Chromosomal analysis of this karyotype reveals the abnormality in this karyotype is:
a missing X chromosome
a missing Y chromosome
an extra 21 chromosome
missing chromosome #9
Homologous pairs:
(select all that apply)
Have the same genes on them
May have different alleles
Each comes from one parent
Combine to give you your genotypes
This is known as Edwards Syndrome, can you identify the chromosomal mutation?
Chromosomes 1 and 2 are bent
There is no Y chromosome
This persons chromosomes are normal
There are 3 of chromosomes 18
This karyotype shows ____________?
A biological male with a missing chromosome
A biological female with the normal number of chromosomes
A biological male with the normal number of chromosomes
A biological female with an extra chromosome
Which would be considered a gamete ?
Sperm cell
Egg Cell
Skin Cell
All of these
How many chromosomes are in a typical human somatic (body) cell?
23
22
44
46
