Chapter 8: Heredity

Female mammals

________ have two X chromosomes in each cell, but one of them does not leave the nucleus of the cell.

term geno

What is used to describe all of an individual's alleles, and its phenotype is used to describe the expression of those alleles? Answer with a single words or term.

test cross

What is used to determine which genotype is correct? Answer with a single words or term.

Barr body

The ________ is formed by the extra X chromosome, but it is mostly inactive.

Gene function

________ can be affected by most point mutations.

final step

What is to count how many times each phenotype appears? Answer with a single words or term.

syndrome

What is caused by the nondisjunction of the two number 21 chromosomes? Answer with a single words or term.

parents

Both ________ have red hair.

genetics problem

What is an analysis of the characteristics of parents and offspring? Answer with a single words or term.

positions

What are possible at this point? Answer with a single words or term.

Diagrams

________ can be used to supplement your answers, but a(n) ________ alone is not adequate.

false statement

What is answer choice C. Answer choice B is true because the same genes would be on the homologous chromosomes? Answer with a single words or term.

Recombination frequencies

What are used to give a picture of the arrangement of genes? Answer with a single words or term.

actual trait

What is expressed by the dominant allele? Answer with a single words or term.

homologue

Each ________ migrates to a different pole and becomes a different gamete.

next step

What is to figure out how the gametes from one and the other parent can be combined? Answer with a single words or term.

Animals

________ have one pair of chromosomes that do not have the same genes.