Mendelian and Molecular Genetics Quiz Test

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

David Willams 3 years ago

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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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