A manifesting heterozygote…

The trait of medium-sized leaves in iris is determined by the genetic condition PP’. Plants with large leaves are PP, while plants with small leaves are P’P’. A cross is made between two plants each with medium-sized leaves. They produce 80 seedlings. How would you describe the genotype of the plants with medium-sized leaves?

The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by a recessive mutant gene that independently assorts with a recessive gene for hairy (h ) body. Assume that a cross is made between a fly with normal wings (homozygous) and a hairy body and a fly with vestigial wings and normal body hair (homozygous). The wild-type F1 flies were crossed among each other to produce 1024 offspring. How many of the flies would you expect to have both vestigial wings and a hairy body?

A cross was made between homozygous wild-type female Drosophila and yellow-bodied male Drosophila. All of the resulting offspring were phenotypically wild type. Offspring of the F2 generation had the following phenotypes:         Sex               Phenotype           Number         male                wild                     96       male              yellow                   99       female             wild                   197   Is the mutant gene for yellow body behaving as a recessive or dominant?

A cell with an extra chromosome is called:

Individuals with Turner syndrome have a single X chromosome and no Y chromosome. Turner syndrome is an example of:

X-inactivation is an example of what type of genetic change?

When two or more gene loci contribute to a phenotype in an additive way, the result is what type of variation?

Synapsis occurs when what come together in prophase I?

Tall is dominant to dwarf in pea plants. If two dwarf pea plants were crossed, their offspring will be: