Practise IB Biology HL D3.2 with inheritance diagrams and data questions on alleles, pedigrees, linkage, variation, probability and genetic disorders.
What is always passed to the next generation as a result of sexual reproduction?
Homologous chromosomes from the mother
A chromatid from every chromosome of the father
A haploid set of chromosomes from the mother
All alleles from each parent
A pea plant that is homozygous for purple flowers is crossed with a pea plant having white flowers and the descendants are all plants with purple flowers. One of these plants is then crossed with a pea plant having white flowers. In the resulting offspring, what can be expected?
100 % of plants with purple flowers
100 % of plants with white flowers
75 % of plants with purple flowers, 25 % with white flowers
50 % of plants with purple flowers, 50 % with white flowers
In a strain of soybeans, high oil content (H) in seeds is dominant to low oil content (h) and four seeds in a pod (F) is dominant to two seeds in a pod (f). A farmer crosses two soybean plants, both with high oil content and four seeds in a pod. The offspring have a phenotypic ratio of 9: 3: 3: 1.
Identify the genotypes of the soybean plants with high oil content and four seeds in a pod that were used in the cross.
For the soybean cross HhFf × HhFf, determine the genotypes of the gametes and offspring using a Punnett grid.
Identify the phenotypes of each part of the phenotypic ratio.
