18.1. Variation
A subsection of Biology, 0610, through 18. Variation and selection
Listing 10 of 83 questions
The length of hair in cats is controlled by a single gene. • The allele for short hair is dominant – H • The allele for long hair is recessive – h is a photograph of two cats. cat A cat B Table 3.1 shows some of the genetic and physical features of the cats in . Complete Table 3.1. Table 3.1 cat A cat B phenotype long hair genotype HH or State the genotype of a pure-breeding short-haired cat. Two cats with the genotypes HH and hh were bred together. Predict the percentage of offspring that are heterozygous. % The statements describe features of continuous or discontinuous variation. Identify the type of variation each statement describes. Write the letter C for continuous variation or D for discontinuous variation in the spaces provided. Height is an example of this type of variation. There are no intermediate phenotypes with this type of variation. This type of variation results in a limited number of phenotypes. A student wrote a definition of variation as: ‘the similarities between individuals of the same kingdom’. Identify the two incorrect words in the student’s definition.
0610_m20_qp_32
THEORY
2020
Paper 3, Variant 2
View
For Examiner's Use Two types of variation, continuous and discontinuous, occur in living organisms. Complete Table 5.1 about the two types of variation. Table 5.1 continuous variation discontinuous variation example of variation in humans ………………………………. ………………………………. ………………………………. ………………………………. factors that influence variation ………………………………. ………………………………. ………………………………. ………………………………. State the meaning of the terms gene and allele. gene allele Nuclei can be diploid or haploid. Compare these two types of nuclei.
0610_s11_qp_22
THEORY
2011
Paper 2, Variant 2
View
Questions Discovered
83