| Answer | Crossword Clue |
|---|---|
| BIPEDS | Humans and birds, e.g. |
| BIPEDS | Humans and ostriches, e.g. |
| BIPEDS | Kangaroos and humans, e.g. |
| KIN | Humans and apes, e.g. |
| BIPEDS | Birds and people, e.g. |
| heterogametic | Denoting the sex that has sex chromosomes that differ in morphology, resulting in two different kinds of gamete, e.g., (in mammals) the male and (in birds) the female |
| homogametic | Denoting the sex that has sex chromosomes that do not differ in morphology, resulting in only one kind of gamete, e.g., (in mammals) the female and (in birds) the male |
