sb015 inheritance

F1 generation was self crossed to produce F2 generation. Determine the parent's genotype if Y is dominant for pea colour.

• Yy x Yy

• yy x Yy

• YY x yy

• Yy x yy

If individual A of the F2 generation were self-crossed, what percentage would it be for the offspring to be yellow?

• 0%

• 25%

• 50%

• 100%

A type-B blood man has children with a woman of type-AB blood, what blood types could their children have?

• I, II and III only

• I, II and IV only

• II, III and IV only

• I, II, III and IV

In barley plants, the allele for tall stalks is dominant over short stalks and the allele for wide leaves is dominant over thin leaves. What would be the best way to determine the genotype of a barley plant with a tall stalk and wide leaves?

• Perform a cross with a barley plant that has a tall stalk and thin leaves

• Perform a cross with a known heterozygous barley plant

• Perform a cross with a barley plant that has a short stalk and thin leaves

• Perform a cross with a barley plant that has a tall stalk and wide leaves

In a cross of AaBb x AaBb, what fraction of the offspring can be expected to express one of the dominant phenotype, but not both?

• 9/16

• 1/2

• 3/8

• 3/16

If a purple flower (P) and long pollen (L) which are heterozygous for both alleles is test crossed with white flower (p) and round pollen (l) produces the equal percentage of purple with long pollen, purple with round pollen, white with long pollen and white with round pollen. Determine the characteristic of the alleles

• I and II only

• II and III only

• I and III only

• III and IV only

In a cross of AaBb x AaBb, what fraction of the offspring can be expected to have homozygous for one of the dominant alleles and heterozygous for the other?

• 9/16

• 1/2

• 3/8

• 1/4

A cross between two pea plants with genotypes PpLl and PpLl results in an F1 generation that is 50% PPLL and 50% ppll. Which reason most likely explains why other possible genotypes are not present?

• The genes underwent independent assortment

• The loci of the genes are close together.

• The loci of the genes are on different chromosomes.

• Crossing over occurred between chromosomes.

13. Gene A, B C and D are located on the same chromosome. Figure below shows, investigation of a large population produce the following cross-over value (COV) between pairs of gene. Which of the following sequence of letters represent the sequence of gene on the chromosome?

• B,A,C,D

• B,D,C,A

• B,C,D,A

• B,C,A,D

Provided the data, predict the correct parents crossing

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