Question

19. Individuals having two identical alleles for the same gene/trait (QQ or qq) are … Dominant...

19. Individuals having two identical alleles for the same gene/trait (QQ or qq) are …

Dominant

Homozygous

Recessive

Heterozygous

20. What event accounts for the recombination of linked genes?

Mutation

Non-disjunction

Crossing Over

Replication

21. A genetic disease, such as achondroplasia, which only requires one disease allele to be expressed in an individual is said to be a __ disorder.

Heterozygous

Homozygous

Recessive

Dominan

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Answer #1

19. Homozygous

Homozygous refers to a particular gene that have identical alleles on both homologous chromosomes. It is referred by two capital letters (XX) for a dominant trait, and two lowercase letters (xx) for a recessive trait.

20. Crossing over

The more is the crossing over the more is the recombination of the linked genes.

21. I think that the last options is dominant not dominan and the answer is dominant.

Achondroplasia is bone growth disorder inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder.

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