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Mendelian and Molecular Genetics Quiz Test

Mendelian and Molecular Genetics Quiz Test

Mendelian and Molecular Genetics Quiz. Answer these questions and find out.

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Quiz Questions And Answers

During his studies on the genetics of peas, Mendel discovered three laws of inheritance:

dominance
recombination

Genes occur as alleles on chromosomes. If both alleles are the same, the organism is ________ for that allele.

dominance
independent assortment
homozygous

When one of a pair of alleles is expressed, and the other is not, the expressed allele is called the ________ allele.

segregation
dominant
independent assortment

To discover whether a tall parent can be either TT (homozygous) or Tt (heterozygous), a _____ cross is performed using a homozygous _____ parent.

segregation
recombination
test, recessive

If a monohybrid, heterozygous F1 generation is crossed with itself (selfed), the phenotypic ratio of the F2 generation will be:

3:1
2:2
4:0
1:1

Human blood types are governed by the independent alleles A and B. If both alleles are present, the person's blood type is AB. The expression of both alleles equally is called ____

segregation
dominance
codominance

Organisms with the same phenotype always have the same genotype

False
True

In humans, some traits such as color-blindness and hemophilia are carried only on the X chromosomes. These are known as _______ traits.

sex-linked
autosomal
chromosomal
homozygous

The molecular structure of DNA is a __________.

double helix
hairpin loop
single strand
tetramer

The two strands of DNA are held together by ___________ between complementary bases.

hydrogen bonds
covalent bonds
ionic bonds
weak nuclear bonds
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