1. IBIB
2. IOIO
3. IBIO
4. IAIB
IOIO
1. Can be determined only when more than two loci are studied
2. Cannot be determined by back crossing trihybrid Drosophila males to triple recessive females
3. Is rarely changed by crossing over
4. Is presumably linear in chromosome map
Can be determined only when more than two loci are studied
1. 46
2. 23
3. 48
4. 10
23
1. Selective mating and a small population
2. A high mutation rate and random mating
3. A low mutation rate and a small population
4. No migration and a large population
No migration and a large population
1. G1
2. S
3. G2
4. Metaphase
S
1. All the linked genes of a chromosome
2. All the linked genes of a chromosome pair
3. Different groups of genes located on the same chromosome
4. None of the above
All the linked genes of a chromosome
1. More than one allele of a gene is necessary to produce the effect
2. Many genes influence a simple character
3. Many characters are influenced by a simple gene
4. One gene incompletely dominates the effect of its allele
Many genes influence a simple character
1. X-chromosome
2. Y-chromosome
3. Autosomes
4. Sex chromosomes
Y-chromosome
1. 300
2. 200
3. 100
4. 50
200
1. 21 pairs normal,22 and 23 extra
2. 22 pairs are normal,one chromosome has trisomy
3. 24 pairs normal and one extra chromosome
4. 22 pairs of normal chromosomes with one X chromosome
22 pairs are normal,one chromosome has trisomy