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WorksheetsGenetics and Biotechnology
Total questions: 25
Worksheet time: 13mins
What is this arrangement of chromosomes this called?
Pedigree
Karyotype
Meiosis
DNA Microarray
The DNA is in this form during interphase of cell cycle:
chromatids
chromosomes
chromatin
free floating nucleotides
In eukaryotic cells, where is the DNA contained?
vesicles
cytoplasm
ribosomes
nucleus
What process is cell division for creation of more somatic (body) cells?
Meiosis
Mitosis
What process is used for the creation of gametes (sperm or egg)?
Mitosis
Meiosis
Which of the following is the correct description of a gamete?
haploid (N)
diploid (2N)
In prophase 1 of meiosis, this occurs to increase genetic variety of potential offspring:
homologous chromosomes line up down the middle of the cell
crossing over, exchange of genetic material
nuclear envelope breaks apart
nondisjunction
In meiosis 1 ______________ are pulled apart in anaphase.
sister chromatids
homologous chromosomes
free floating nucleotides
nuclei
In meiosis II the ________________ are pulled apart in anaphase.
homologous chromosomes
nuclei
sister chromatids
free floating nucleotides
In organisms that reproduce sexually, each individual has ________ for each gene.
1 allele
2 alleles
4 alleles
one chromosome
Regarding inheritance of genes by sexual reproduction, which of the following is true?
For each gene, the individual inherits one allele from the mother and one allele from the father.
For each gene, the individual inherits one allele either from the mother or the father.
For each gene, the individual inherits 2 copies from the mother and 2 copies from the father.
For each gene, the individual inherits both dominant alleles from one parent.
Gregor Mendel observed this in pea plants:
Genes were inherited and expressed at random and there was no way to predict it.
Some traits were dominant and masked the recessive traits.
The offspring inherit genes from one parent or the other, not both.
If one parent possess two dominant alleles, the offspring will inherit both dominant alleles.
A roan coat color is produced by a red horse and a white horse producing heterozygous offspring. This is an example of:
complete dominance
incomplete dominance
codominance
sex-linked trait
A blending of two traits, such as a blue flower and a red flower producing a purple flower:
codominance
sex-linked trait
complete dominance
incomplete dominance
Three alleles for blood type (A,B,O) is an example of __________ and type AB blood is an example of __________.
incomplete dominance, codominance
multiple alleles, codominance
codominance, incomplete dominance
sex-linked trait, codominance
Normally meiosis will result in 23 chromosomes in each human gamete, but when this separation of chromosomes does not occur correctly it is called:
recombinant DNA
polymerase chain reaction
nondisjunction
polygenic
Gregor Mendel concluded that the alleles for each gene separate in the formation of gametes, so each gamete only gets one allele for the gene. This is known as:
The law of independent assortment
The law of segregation
The white eye color in fruit flies is more often observed in males, and the females are more likely to be carriers. This is an example of:
recessive autosomal trait
dominant autosomal trait
recessive sex-linked trait
dominant sex-linked trait
According to the information on this pedigree, which is more likely?
Tay-Sachs disease is autosomal dominant.
Tay-Sachs disease is autosomal recessive.
Tay-Sachs disease is a sex-linked trait.
Tay-Sachs disease is a random mutation that cannot be inherited.
Huntington's disease, a degenerative disease of nerve cells in the brain, is autosomal dominant, which means:
A person can be a heterozygous carrier and not have the disease.
A person has to be homozygous dominant in order to have the disease.
If a person inherits just one allele they will have the disease.
A person who has the disease has 100% chance of passing it on to their offspring.
If the mother is type B blood, and the baby is type A blood, which of these could possibly be the father?
O blood type
B blood type
AB blood type
A trait like eye color in humans that is caused by several genes working together, is called:
polygenic
codominant
sex-linked
complete dominance
Selective breeding of dogs and corn are both examples of:
natural selection
random mutation
artificial selection
polyploidy
Nondisjunction can cause Trisomy 21 (3 chromosomes instead of 2 in the 21st pair), which results in what outcome?
Huntington's disease
Color-blindness
Hemophilia
Down Syndrome
Some genes can be responsible for "turning on" other genes. This helps explain the extreme phenotypic differences between teosinte and corn. These genes that work like conductors of other genes are called:
recessive genes
transgenic genes
regulatory genes
