C3 Mid Cycle Review

Front

What is achondroplasia?

Back

Achondroplasia is an inherited condition characterized by the abnormal growth of bones, leading to dwarfism. It is caused by a dominant allele (A) that affects bone formation.

Front

What is the inheritance pattern of achondroplasia?

Back

Achondroplasia follows a dominant inheritance pattern, meaning that only one copy of the dominant allele (A) is needed for the trait to be expressed.

Front

If one parent is homozygous dominant (AA) and the other is homozygous recessive (aa), what percentage of their children will have achondroplasia?

Back

100% of the children will have achondroplasia, as all offspring will inherit one dominant allele (A) from the homozygous dominant parent.

Front

What is codominance in genetics?

Back

Codominance is a form of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive.

Front

In a cross between a black angelfish and a black-lace angelfish, what are the expected phenotypes of the offspring?

Back

The expected phenotypes are Silver, Black, and Black Lace, with a phenotypic probability of 50% for Black and 50% for Black Lace.

Front

What does it mean for traits to be inherited independently?

Back

Independent inheritance means that the inheritance of one trait does not affect the inheritance of another trait, as described by Mendel's law of independent assortment.

Front

If both parents are heterozygous for two traits, how many offspring would be heterozygous for at least one gene out of 2,560 total offspring?

Back

1,920 offspring would be heterozygous for at least one gene.

Front

How many chromosomes do giraffes have in their somatic cells?

Back

Giraffes have 30 chromosomes in their somatic cells.

Front

How many chromosomes will each daughter cell have after meiosis in giraffes?

Back

Each daughter cell will have 15 chromosomes after meiosis.

Front

What is cystic fibrosis?

Back

Cystic fibrosis is an autosomal recessive disorder that affects the respiratory and digestive systems, caused by mutations in the CFTR gene.