Genetic Inheritance

The set of alleles for a trait of an organism is known as

• homozygous

• heterozygous

• phenotype

• genotype

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Mendel’s principle of segregation states that:

• alleles from one parent mask the expression of allele from the other parent

• alleles separate from each other before forming gametes

• hybrids will express a phenotype intermediate between the two parental phenotypes

• true-breeding parents produce offspring of the same phenotype

Tags

NGSS.HS-LS3-1

Two Martians fall in love and marry. One Martian is homozygous for red eyes and the other is heterozygous. The recessive eye color is purple. What are the chances that the alien couple will have a child with red eyes?

• 100%

• 50%

• 75%

• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Alleles segregate independently of other alleles because…………………

• maternal and paternal chromosomes line up randomly on either side of the equator during metaphase I

• separation of sister chromatids during anaphase I

• homologous chromosomes moves to the opposite poles of the cell

• crossing over during prophase I

Tags

NGSS.HS-LS3-2

If gene A and gene B are located in a different chromosome, which of the following crossing will produce the progeny with genotype AaBb?

I. Aabb X aaBb

II. AaBB X Aabb

III. aaBB XAABb

IV. Aabb X AaBb

• I, II and III

• I, II, III and IV

• B. I, II and IV

• I, III and IV

Tags

NGSS.HS-LS3-1

In aubergine plant, the gene for brown stem is dominant over its allele for green stem, and the gene for purple fruit is dominant over its allele for white fruit. If two aubergine plants which are heterozygous for both characteristics are crossed, what is the ratio of the expected progeny to have brown stem and white fruit?

• 1/16

• 4/16

• 3/16

• 6/16

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Brown eye color is dominant. Blue eye color is recessive. Select the combination of letters below that would represent a person being a pure breed for brown eyes

• AA

• aA

• aa

• Aa

Tags

NGSS.HS-LS3-1

Which of the following represents the possible genotypes resulting from a cross between an individual heterozygous (Bb) and one that is homozygous recessive (bb)?

• B. Bb and bb

• BB and bb

• Bb only

• BB and Bb

Tags

NGSS.HS-LS3-1

How do you determine the genotype of a plant with a dominant trait?

• Test cross with homozygous dominant

• Test cross with heterozygous

• Test cross with homozygous recessive

• Back cross with its parent

The colour of snapdragon flower shows

• dihybrid inheritance

• incomplete dominant alleles inheritance

• codominant alleles inheritance

• monohybrid inheritance

Tags

NGSS.HS-LS3-1